JP3951136B2 - Novel pyridonecarboxylic acid derivative or salt thereof and antibacterial agent comprising the substance as an active ingredient - Google Patents

Description

  The present invention relates to a novel pyridonecarboxylic acid derivative having excellent antibacterial action and oral absorption or a salt thereof and an antibacterial agent containing the same.

  Many compounds having pyridonecarboxylic acid as a basic skeleton are known to be useful as synthetic antibacterial agents because they have excellent antibacterial activity and a broad antibacterial spectrum. Among them, norfloxacin (Japanese Patent Laid-Open No. 53-141286), enoxacin (Japanese Patent Laid-Open No. 55-31042), ofloxacin (Japanese Patent Laid-Open No. 57-46986), ciprofloxacin (Japanese Patent Laid-Open No. 58-76667). Nos.), Tosufloxaquin (Japanese Patent Laid-Open No. 60-228479) and the like are widely used in clinical practice as therapeutic agents for infectious diseases.

  However, these compounds are still insufficient in terms of antibacterial activity, intestinal absorption, metabolic stability and side effects, particularly phototoxicity and cytotoxicity.

JP-A-53-141286 JP-A-55-31042 JP 57-46986 A JP 58-76667 A JP 60-228479 A

  The present invention has been made in view of the above circumstances, and includes a novel pyridonecarboxylic acid derivative or salt thereof that satisfies the antibacterial activity, intestinal absorbability, metabolic stability and side effects, particularly phototoxicity and cytotoxicity, and the like. It aims at providing the antibacterial agent containing this.

  In view of such circumstances, the present inventors have intensively studied to obtain a compound that can be a clinically superior synthetic antibacterial agent. As a result, the compound represented by the following general formula (1) is a gram-negative bacterium and a gram-positive bacterium. It has been found that it has excellent antibacterial properties, is extremely low in toxicity and is useful as a synthetic antibacterial agent, and has led to the present invention.

〔式中、Ｒ¹は水素原子又はカルボキシ保護基を示し、Ｒ²はニトロ基、アミノ基若しくは、低級アルキル基，低級アルケニル基，炭素数７〜１１のアラルキル基，炭素数６〜１４のアリール基，ホルミル基，低級アルカノイル基，低級アルコキシカルボニル基，炭素数７〜１５のアロイル基，アミノ酸残基あるいはオリゴペプチド残基及びこれらの官能基がアシル基や低級アラルキル等のペプチド化学で慣用の保護基で保護されたアミノ酸残基あるいはオリゴペプチド残基、又は環状アミノ基で置換された置換アミノ基を示し、Ｒ³はハロゲン原子を示し、Ｒ⁴及びＲ⁵は同一又は異なっていてもよい水素原子、ハロゲン原子、低級アルキル基又は低級アルコキシ基を示し、Ｒ⁶は水素原子、ハロゲン原子、ヒドロキシ基、低級アルキル基又はアミノ基を示し、Ｒ⁷は水素原子又はハロゲン原子を示し、Ａは窒素原子又は−ＣＸ＝（ここで、Ｘは水素原子、ハロゲン原子、低級アルキル基又は低級アルコキシ基を示す）を示し、Ｚは後述する次式（ａ）示される飽和環状アミノ基を示す。〕
で表わされるピリドンカルボン酸誘導体又はその塩を提供する。
また、本発明は当該ピリドンカルボン酸誘導体又はその塩を有効成分とする抗菌剤を提供する。 That is, the present invention provides the following general formula (1)

[Wherein, R ¹ represents a hydrogen atom or a carboxy protecting group, and R ² represents a nitro group, an amino group, a lower alkyl group, a lower alkenyl group, an aralkyl group having 7 to 11 carbon atoms, or an aryl having 6 to 14 carbon atoms. Group, formyl group, lower alkanoyl group, lower alkoxycarbonyl group, aroyl group having 7 to 15 carbon atoms, amino acid residue or oligopeptide residue, and these functional groups are commonly used in peptide chemistry such as acyl group and lower aralkyl. An amino acid residue or oligopeptide residue protected with a group, or a substituted amino group substituted with a cyclic amino group, R ³ represents a halogen atom, and R ⁴ and R ⁵ may be the same or different hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, R ⁶ is a hydrogen atom, a halogen atom, hydroxy group, lower alkyl group or Shows the amino group, R ⁷ represents a hydrogen atom or a halogen atom, A is a nitrogen atom or -CX = (wherein, X represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group) a, Z Represents a saturated cyclic amino group represented by the following formula (a) . ]
A pyridonecarboxylic acid derivative represented by the formula:
Moreover, this invention provides the antibacterial agent which uses the said pyridone carboxylic acid derivative or its salt as an active ingredient.

  The compound (1) of the present invention and its salt have a very high antibacterial effect, and have low phototoxicity and cytotoxicity. Therefore, the compound (1) and its salt can be widely used as pharmaceuticals for human bodies and animals, fish diseases, agricultural chemicals, food preservatives, etc. it can. Furthermore, the compound of the present invention can be expected to have an antiviral action, particularly an anti-HIV (human immunodeficiency virus) action, and is considered to have an effect on the prevention or treatment of AIDS.

  Hereinafter, the present invention will be described in more detail. In addition, in the substituent of the pyridonecarboxylic acid derivative represented by the above general formula (1) of the present invention, “lower” means that having 1 to 7 carbon atoms when the substituent is a chain, The thing of C1-C5 is preferable, and when it is cyclic, it means a C3-C7 thing.

In the general formula (1), the carboxy-protecting group represented by R ^1, refers to an ester residue of a carboxylic acid ester, is relatively easy to cleave, any resulting in the corresponding free carboxyl group as Specific examples thereof include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t-butyl group, pentyl group, hexyl group, heptyl group and the like. Lower alkyl group; lower alkenyl group such as vinyl group, allyl group, 1-propenyl group, butenyl group, pentenyl group, hexenyl group and heptenyl group; aralkyl group having 7 to 11 carbon atoms such as benzyl group; phenyl group and naphthyl group Such as an aryl group having 6 to 14 carbon atoms, etc., which is eliminated by treatment under mild conditions such as hydrolysis or catalytic reduction, or an acetoxymethyl group, pivaloyloxymethyl Lower alkanoyloxy lower alkyl group such as a group; lower alkoxycarbonyloxy lower alkyl group such as methoxycarbonyloxymethyl group and 1-ethoxycarbonyloxyethyl group; lower alkoxy lower alkyl group such as methoxymethyl group; lactonyl group such as phthalidyl group Di-lower alkylamino lower alkyl groups such as 1-dimethylaminoethyl group; (5-methyl-2-oxo-1,3-dioxo-l-4-yl) methyl group and the like easily desorb in vivo And the like. R ¹ is particularly preferably a hydrogen atom.

Examples of the substituent in the substituted amino group represented by R ² include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, pentyl, and hexyl. Group, lower alkyl group such as heptyl group; lower alkenyl group such as vinyl group, allyl group, 1-propenyl group, butenyl group, pentenyl group, hexenyl group and heptenyl group; carbon number such as benzyl group and 1-phenylethyl group Aralkyl group having 7 to 11; aryl group having 6 to 14 carbon atoms such as phenyl group and naphthyl group; lower alkanoyl group such as formyl group, acetyl group, propionyl group, butyryl group and isobutyryl group; methoxycarbonyl group and ethoxycarbonyl group Lower alkoxycarbonyl group such as benzoyl group, aroyl group having 7 to 15 carbon atoms such as naphthoyl; glycyl, Amino acid residues or oligopeptide residues such as isyl, valyl, alanyl, phenylalanyl, alanyl-alanyl, glycyl-valyl, glycyl-glycyl-valyl and their functional groups are commonly used in peptide chemistry such as acyl groups and lower aralkyls. An amino acid residue or an oligopeptide residue protected with a protecting group, or a cyclic amino group. These substituents can be arbitrarily selected from 1 to 2 of the same type or different types. Compounds protected with such amino acid residues or peptide residues are expected to have improved water solubility.

More preferable R ² includes an amino group, a lower alkylamino group, a di-lower alkylamino group, a lower alkanoylamino group, an amino acid-substituted amino group, and an oligopeptide-substituted amino group. More preferred examples of R ² include amino group, methylamino group, ethylamino group, dimethylamino group, formylamino group, glycyl-amino group, leucyl-amino group, valyl-amino group, alanyl-amino group, alanyl- An alanyl-amino group etc. are mentioned, Among these, an amino group is especially preferable.

Examples of the halogen atom represented by R ³ , R ⁴ , R ⁵ , R ⁶ and R ⁷ include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom. Among them, a fluorine atom or a chlorine atom is preferable, and a fluorine atom Is particularly preferred.

Examples of the lower alkyl group represented by R ⁴ , R ⁵ , R ⁶ and X include methyl group, ethyl group, n-propyl group, 1-propyl group, n-butyl group, i-butyl group, t-butyl group, A pentyl group, a hexyl group, a heptyl group, etc. are mentioned, and especially a methyl group is preferable. Examples of the lower alkoxy group represented by R ⁴ , R ⁵ and X include a methoxy group, an ethoxy group, an n-propoxy group, an n-butoxy group and a t-butoxy group.

A preferred combination of R ⁴ and R ⁵ is a halogen atom and a hydrogen atom, more preferably R ⁴ is a fluorine atom or a chlorine atom and R ⁵ is a hydrogen atom, and R ⁴ is a fluorine atom and R ⁵ is a hydrogen atom. Particularly preferred is an atom. R ⁴ is particularly preferably substituted at the para position of R ² .

Examples of the halogen atom represented by X include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and a fluorine atom and a chlorine atom are particularly preferable.

  Further, the compound of formula (1) has a naphthyridine skeleton when A represents a nitrogen atom, and has a quinoline skeleton when A represents -CX =, but when A represents a nitrogen atom. And -CCl = is particularly preferred.

（ここで、ｅは３又は４の数を示し、Ｊ¹，Ｊ²及びＪ³は同一又は異なっていてもよく、水素原子、ヒドロキシル基、低級アルキル基、アミノ低級アルキル基、アミノ基、低級アルキルアミノ基、低級アルコキシ基、ハロゲン原子を示す） In the present invention, the saturated cyclic amino group represented by Z is represented by the following formula (a).

(Here, e represents a number of 3 or 4 , and J ¹ , J ² and J ³ may be the same or different, and are a hydrogen atom, a hydroxyl group, a lower alkyl group, an amino lower alkyl group, an amino group, a lower group, An alkylamino group, a lower alkoxy group or a halogen atom)

Examples of the lower alkyl group, amino lower alkyl group, lower alkylamino group, lower alkoxy group and halogen atom in the formula (a) are the same as the groups shown for R ^{2 to} R ⁵ above.

Examples of the cyclic amino group represented by the formula (a) include an azetidin-1-yl group and a pyrrolidin-1-yl group.

A particularly preferred specific example of the group represented by the formula (a) is as follows.

3-aminoazetidin-1-yl group, 3-methylaminoazetidin-1-yl group, 3-dimethylaminoazetidin-1-yl group, 3-aminomethylazetidin-1-yl group, 3-amino 2-methylazetidin-1-yl group, 3-amino-3-methylazetidin-1-yl group, 3-alanyl-aminoazetidin-1-yl group, 3-valyl-aminoazetidin-1- Yl group, pyrrolidin-1-yl group, 3-hydroxypyrrolidin-1-yl group, 3,4-dihydroxypyrrolidin-1-yl group, 3-methoxypyrrolidin-1-yl group, 3-methylpyrrolidin-1-yl Group, 3-hydroxy-4-methylpyrrolidin-1-yl group, 3-aminopyrrolidin-1-yl group, 3-methylaminopyrrolidin-1-yl group, 3-dimethylaminopyrrolidin-1 Yl group, 3-ethylaminopyrrolidin-1-yl group, 3-diethylaminopyrrolidin-1-yl group, 3-aminomethylpyrrolidin-1-yl group, 3-amino-3-methylpyrrolidin-1-yl group, 3 -Amino-4-methylpyrrolidin-1-yl group, 3-amino-5-methylpyrrolidin-1-yl group, 3-methylamino-4-methylpyrrolidin-1-yl group, 3-dimethylamino-4-methyl Pyrrolidin-1-yl group, 3-ethylamino-4-methylpyrrolidin-1-yl group, 3-diethylamino-3-methylpyrrolidin-1-yl group, 3-diethylamino-4-methylpyrrolidin-1-yl group, 3-aminomethyl-4-methylpyrrolidin-1-yl group, 3-methylaminomethyl-4-methylpyrrolidin-1-yl group, 3-dimethylaminomethyl group Ru-4-methylpyrrolidin-1-yl group, 3-ethylaminomethyl-4-methylpyrrolidin-1-yl group, 3- (1-aminoethyl) -4-methylpyrrolidin-1-yl group, 3- ( 2-aminoethyl) -4-methylpyrrolidin-1-yl group, 3-amino-4-ethylpyrrolidin-1-yl group, 3-methylamino-4-ethylpyrrolidin-1-yl group, 3-dimethylamino- 4-ethylpyrrolidin-1-yl group, 3-ethylamino-4-ethylpyrrolidin-1-yl group, 3-diethylamino-4-ethylpyrrolidin-1-yl group, 3-aminomethyl-4-ethylpyrrolidin-1 -Yl group, 3-methylaminomethyl-4-ethylpyrrolidin-1-yl group, 3-dimethylaminomethyl-4-ethylpyrrolidin-1-yl group, 3-amino-3-methyl Pyrrolidin-1-yl group, 3-methylamino-3-methylpyrrolidin-1-yl group, 3-dimethylamino-3-methylpyrrolidin-1-yl group, 3-amino-3,4-dimethylpyrrolidin-1- Yl group, 3-amino-4,4-dimethylpyrrolidin-1-yl group, 3-amino-4,5-dimethylpyrrolidin-1-yl group, 3-amino-2,4-dimethylpyrrolidin-1-yl group 3-methylamino-3,4-dimethylpyrrolidin-1-yl group, 2-methyl-3-aminopyrrolidin-1-yl group, 2-methyl-3-dimethylaminopyrrolidin-1-yl group, 3-amino -4-methoxypyrrolidin-1-yl group, 3-alanyl-aminopyrrolidin-1-yl group, 3-valyl-aminopyrrolidin-1-yl group.

In the combination of R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , A and Z in the general formula (1), R ¹ is a hydrogen atom; R ² is an amino group, lower Alkylamino group, di-lower alkylamino group, lower alkanoylamino group, amino acid-substituted amino group or oligopeptide-substituted amino group; R ³ is a halogen atom; R ⁴ is a halogen atom; R ⁵ is a hydrogen atom; R ⁶ is a hydrogen atom; In this case, R ⁷ is a fluorine atom; A is a nitrogen atom, —CH═ or —CCl═; Z is a group represented by the formula (a). More preferred combinations of R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , A and Z are as follows: R ¹ is a hydrogen atom; R ² is an amino group; R ³ is a fluorine atom or a chlorine atom R ⁴ is a fluorine atom or a chlorine atom (substituted at the para position of R ² ); R ⁵ is a hydrogen atom; R ⁶ is a hydrogen atom; R ⁷ is a fluorine atom; A is a nitrogen atom or —CCl =; This is the case of the group represented by (a) (e = 3 or 4).

  The pyridonecarboxylic acid derivative or its salt (1) can form both an acid addition salt or a base addition salt. This salt includes those formed with a chelate salt with a boron compound. Examples of acid addition salts include (A) salts with mineral acids such as hydrochloric acid and sulfuric acid, (B) salts with organic carboxylic acids such as formic acid, citric acid, trichloroacetic acid, trifluoroacetic acid, fumaric acid and maleic acid, (C) Salts with sulfonic acids such as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, mesitylenesulfonic acid and naphthalenesulfonic acid, and as base addition salts, for example, (A ′) sodium, potassium, etc. (B ′) salts with alkaline earth metals such as calcium and magnesium, (C ′) ammonium salts, (D ′) trimethylamine, triethylamine, tributylamine, pyridine, N, N-dimethylaniline N-methylpiperidine, N-methylmorpholine, diethylamine, cyclohexylamine, procaine, di Njiruamin, N- benzyl -β- phenethylamine, 1-Efenamin, N, may be mentioned salts with nitrogen-containing organic bases such as N'- dibenzylethylenediamine. Examples of the boron compound include boron halides such as boron fluoride and lower acyloxyborons such as acetoxyboron.

  The pyridonecarboxylic acid derivative or salt (1) thereof can exist not only as an unsolvated form but also as a hydrate or a solvate. Accordingly, the compounds of the present invention include all crystal forms and hydrates or solvates thereof.

  The pyridonecarboxylic acid derivative or salt (1) thereof can exist as an optically active substance. These optically active substances are also included in the compound of the present invention. Furthermore, the compound (1) can exist as different stereoisomers (cis type, trans type). These stereoisomers are also included in the compounds of the present invention.

  The pyridonecarboxylic acid derivative or its salt (1) is produced by an arbitrary method depending on the type of the substituent and the like, and an example thereof is as follows.

〔式中、Ｒ^1aは低級アルキル基を示し、Ｒ⁹は低級アルコキシ基又は基−ＮＲ¹²Ｒ¹³（ここで、Ｒ¹²及びＲ¹³はそれぞれ低級アルキル基を示す）を示し、Ｒ¹⁰及びＲ¹¹はそれぞれ低級アルキル基を示し、Ｌ¹はハロゲン原子を示し、Ｚ¹はハロゲン原子を示し、Ｒ^2aは置換アミノ基を示し、Ｒ²、Ｒ³、Ｒ⁴、Ｒ⁵、Ｒ⁶、Ｒ⁷及びＡは前記と同じ意味を有する〕 (Step 1) Among the compounds represented by the general formula (1), the production of a compound in which R ¹ is a hydrogen atom or a lower alkyl group and Z is a halogen atom is, for example, a series of steps represented by the following reaction formula 1 manufactured.

[Wherein R ^1a represents a lower alkyl group, R ⁹ represents a lower alkoxy group or a group —NR ¹² R ¹³ (wherein R ¹² and R ¹³ each represent a lower alkyl group), and R ¹⁰ and R ¹¹ represents a lower alkyl group, L ¹ represents a halogen atom, Z ¹ represents a halogen atom, R ^2a represents a substituted amino group, R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and A have the same meaning as above.

  That is, the compounds (1a) to (1d) of the present invention are obtained by reacting a compound (A) with an orthoformate ester (H) such as ethyl orthoformate or methyl orthoformate, followed by reacting the compound (J), The resulting compound (C) is nitrated to give compound (1a), which is reduced to give compound (1b), and this is alkylated or acylated to give compound (1c). If this is hydrolyzed, compound (1d) is obtained. The compound (1d) can also be obtained by hydrolyzing the compound (1b).

  The reaction between compound (A) and orthoformate ester (H) is usually carried out at 0 to 160 ° C., preferably 50 to 150 ° C., and the reaction time is usually 10 minutes to 48 hours, preferably 1 to 10 hours. It is. Further, the amount of orthoformate used is preferably equimolar or more, particularly about 1 to 10-fold mol relative to compound (A).

  The reaction with the compound (J) is carried out without solvent or in a suitable solvent. Further, it is desirable to add a carboxylic acid anhydride such as acetic anhydride as a reaction aid. Any solvent may be used as long as it does not affect the reaction. For example, aromatic hydrocarbons such as benzene, toluene and xylene; diethyl ether, tetrahydrofuran, dioxane, monoglyme, diglyme and the like. Ethers such as; aliphatic hydrocarbons such as pentane, hexane, heptane, ligroin, etc .; halogenated hydrocarbons such as methylene chloride, chloroform, carbon tetrachloride, etc .; non-such as dimethylformamide, dimethyl sulfoxide, etc. Protic polar solvents; alcohols such as methanol, ethanol, propanol and the like. This reaction is usually carried out at 0 to 150 ° C., preferably 0 to 100 ° C., and the reaction time is usually 10 minutes to 48 hours. The amount of compound (J) to be used is equimolar or more, preferably equimolar to 2-fold molar with respect to compound (A).

  As another method, compound (A) is reacted with acetals such as N, N-dimethylformamide dimethyl acetal and N-dimethylformamide diethyl acetal, and then compound (J) is reacted to lead to compound (B). You can also. Any solvent may be used as the solvent used in the reaction with the acetals as long as it does not affect the reaction, and examples thereof include those described above. This reaction is usually carried out at 0 to 150 ° C., preferably room temperature to 100 ° C., and the reaction time is usually 10 minutes to 48 hours, preferably 1 to 10 hours.

  Compound (B) is subjected to a cyclization reaction to obtain compound (C). This reaction is carried out in a suitable solvent in the presence or absence of a basic compound. Any solvent can be used as long as it does not affect the reaction. For example, aromatic hydrocarbons such as benzene, toluene, xylene, etc .; diethyl ether, tetrahydrofuran, dioxane, monoglyme Ethers such as; halogenated hydrocarbons such as methylene chloride, chloroform, carbon tetrachloride, etc .; alcohols such as methanol, ethanol, propanol, butanol, etc .; non-protons such as dimethylformamide, dimethyl sulfoxide, etc. A polar solvent. Examples of basic compounds used include alkali metals such as sodium metal and potassium; metal hydrides such as sodium hydride and calcium hydride; sodium hydroxide, potassium hydroxide, sodium carbonate and carbonate. Inorganic salts such as potassium; alkoxides such as sodium methoxide, sodium ethoxide, potassium-t-butoxide; metal fluorides such as sodium fluoride, potassium fluoride; triethylamine, 1,8-diazabicyclo [5.4.0] Organic salts such as undecene (DBU). The reaction temperature of this reaction is usually 0 to 200 ° C., preferably room temperature to 180 ° C., and the reaction is usually completed in 5 minutes to 24 hours. The usage-amount of a basic compound is equimolar or more with respect to a compound (B), Preferably equimolar-2 times mole are good.

  The compound (1a) of the present invention can be produced by subjecting the compound (C) to a nitration reaction. For the nitration, a general method used for nitration of aromatic compounds is applied, and examples of the nitrating agent include nitric acid or a mixed acid in which nitrate and sulfuric acid are combined, acetyl nitrate, and the like. The amount of mixed acid used in the reaction is 1 equivalent to a large excess of sulfuric acid and 1 equivalent to a large excess of sulfuric acid with respect to 1 equivalent of compound (C). For example, compound (C) is added to the mixed acid in the reaction. Is done by doing. The reaction temperature is preferably −10 ° C. to 80 ° C., and the reaction time is preferably 5 minutes to 5 hours.

Compound (1b) can be obtained by reducing compound (1a).
For the reduction, generally used methods can be applied, for example, dissolved metal reduction using zinc, iron, tin, tin (II) chloride, etc. in an acidic solution, sulfides such as sodium sulfide, sodium hydrosulfide, sodium dithionite, etc. And catalytic reduction using platinum, Raney nickel, platinum-black (Pt-C), palladium-carbon (Pd-C), and the like.

The compound (1d) in which R ¹ is an elementary atom can be obtained by hydrolyzing the compound (1b), or by hydrolyzing the compound (1b) after alkylating or acylating, if desired.

  For the hydrolysis, any of the reaction conditions used in ordinary hydrolysis reactions can be applied. For example, basic compounds such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate; hydrochloric acid, sulfuric acid, hydrobromic acid Mineral acids such as; or in the presence of organic acids such as p-toluenesulfonic acid, water, alcohols such as methanol, ethanol and propanol, ethers such as tetrahydrofuran and dioxane, acetone and methyl ethyl ketone It is carried out in a solvent such as ketones and acetic acid or a mixed solvent thereof. This reaction is usually performed at room temperature to 180 ° C, preferably room temperature to 140 ° C, and the reaction time is usually 1 to 24 hours.

  The alkylation reaction for obtaining the compound (1c) of the present invention is carried out by using an alkylating agent such as dialkyl sulfate, alkyl iodide, or alkyl bromide corresponding to the desired alkyl group, preferably the presence of a base such as sodium carbonate or potassium carbonate. The reaction can be carried out by reacting with compound (1b) in a solution of N, N-dimethylformamide, N-methylpyrrolidone, etc. at a temperature of about room temperature to about 150 ° C. This alkylation reaction can also be carried out by a catalytic reduction method using platinum, Raney nickel, platinum-black, or palladium carbon after coexisting a carbonyl compound corresponding to the desired alkyl group. The acylation reaction can be carried out by any reaction commonly used for acylation of amino groups. For example, an acyl chloride or acid anhydride corresponding to the desired acyl group and compound (1b) are mixed with methylene chloride, chloroform, Halogenated hydrocarbons such as carbon chloride and chlorobenzene; aromatic hydrocarbons such as benzene and toluene; ethers such as tetrahydrofuran and dioxane; or aprotic polar solvents such as acetonitrile and N, N-dimethylformamide at 0 ° C. By reacting at −70 to 100 ° C. in the presence or absence of a base such as pyridine, picoline, N, N-dimethylaniline, N-methylmorpholine, dimethylamine, triethylamine, sodium carbonate, potassium carbonate at room temperature Or an acid such as formic acid or acetic acid or an acid anhydride thereof at room temperature It can also be carried out by reacting at 0.99 ° C..

In the general formula (1), the compound in which R ⁶ is an amino group is obtained by performing the above reaction using the compound (A) in which R ⁶ is a halogen atom as a starting material. After (1c) or (1d), the halogen atom is preferably obtained by amination.

〔式中、Ｒ¹⁴はアミノ保護基を示し、Ｒ^1a、Ｒ³、Ｒ⁴、Ｒ⁵、Ｒ⁶、Ｒ⁷、Ｒ⁹、Ｌ¹、Ｚ¹及びＡは前記と同し意味を有する〕 Compound (1b) can also be synthesized by the following method.

[Wherein R ¹⁴ represents an amino protecting group, and R ^1a , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁹ , L ¹ , Z ¹ and A have the same meanings as described above]

  That is, compound (L) is obtained by condensing and cyclizing acrylic ester (D) and phenylenediamine (K) obtained by reacting orthoformate (H) with compound (A). And then removing the amino protecting group can give compound (1b).

  The reaction for obtaining the compound (L) from the compound (A) can be performed under the same conditions as the reaction for obtaining the compound (C) from the compound (A).

  Amino protecting groups (mainly acyl groups, carbamoyl groups) are removed by hydrolysis with acid or alkali. This condition is the same as described in the hydrolysis to the compounds (1b) and (1c).

〔式中、Ｚ²は置換基を有していてもよい飽和環状アミノ基を示し、Ｒ¹、Ｒ²、Ｒ³、Ｒ⁴、Ｒ⁵、Ｒ⁶、Ｒ⁷、Ｚ¹及びＡは前記と同し意味を有する〕 (Step 2) Among the compounds represented by the general formula (1), a compound in which Z is a saturated cyclic amino group which may have a substituent is produced by, for example, Step 2 represented by the following reaction formula. The

[In the formula, Z ² represents a saturated cyclic amino group which may have a substituent, and R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , Z ¹ and A are the above-mentioned Has the same meaning as

That is, compound (O) is obtained by aminating compound (N) with a compound represented by formula Z ² —H.

In this reaction, aromatic hydrocarbons such as benzene, toluene and xylene; alcohols such as methanol and ethanol; ethers such as tetrahydrofuran, dioxane and monoglyme; methylene chloride, chloroform and carbon tetrachloride Halogenated hydrocarbons such as: aprotic polar solvents such as dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone, etc .; deacidification as necessary in a solvent that does not affect the reaction, such as acetonitrile, pyridine, etc. It is carried out at room temperature to 160 ° C. in the presence of an agent such as sodium carbonate, calcium carbonate, sodium hydrogen carbonate, triethylamine, 1,8-diazabicyclo [5.4.0] undecene (DBU). The reaction time is several minutes to 48 hours, preferably 10 minutes to 24 hours. The amount of compound Z ² —H to be used is equimolar or more, preferably equimolar to 5-fold molar to compound (N). When R ¹ is a carboxy-retaining group, it can be converted to a hydrogen atom by hydrolysis if desired.

〔式中、Ｒ^1bはカルボキシ保護基を示し、Ｌ²はハロゲン原子を示し、Ｒ²、Ｒ³、Ｒ⁴、Ｒ⁵、Ｒ⁶、Ｒ⁷、Ａ及びＺは前記と同じ意味を有する〕 (Step 3) Among the compounds represented by the general formula (1), a compound in which R ¹ is a carboxy protecting group is produced, for example, by Step 3 shown in the following reaction formula.

[Wherein R ^1b represents a carboxy protecting group, L ² represents a halogen atom, and R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , A and Z have the same meaning as described above]

That is, the compound (Q) can be obtained by reacting the compound (P) with the halogen compound R ^1b -L ² . Solvents used here include aromatic hydrocarbons such as benzene and toluene; halogenated hydrocarbons such as methylene chloride and chloroform; aprotic polar solvents such as dimethylformamide and dimethyl sulfoxide. And an inert solvent such as acetonitrile. The reaction temperature is usually from room temperature to around 100 ° C. This reaction is preferably carried out in the presence of a basic compound such as triethylamine, diisopropylethylamine, dicyclohexylamine, DBU, sodium carbonate, potassium carbonate, sodium hydroxide and the like.

  When amino group, imino group, hydroxy group, mercapto group, carboxyl group, etc. not involved in this reaction are present in the raw material compounds used in steps 1 to 3, these groups are used in a protected form, and the reaction is completed. Thereafter, the protecting group may be removed by a conventional method. The protecting group may be any as long as it can be removed without destroying the structure of the compound of the present invention formed by the reaction, and is a group usually used in the field of peptide, amino sugar, or nucleic acid chemistry. Is used.

The starting compound (A) can be produced by the method described in the following literature or a method analogous thereto.
1) J. et al. Heterocyclic Chem. 22, 1033 (1985)
2) Liebigs Ann. Chem. 29 (1987)
3) J. et al. Med. Chem. 31, 991 (1988)
4) J.A. Org. Chem. 35, 930 (1970)
5) Japanese Patent Application Laid-Open No. Sho 62-246541 6) Japanese Patent Application Laid-Open No. Sho 62-26272 7) Japanese Patent Application Laid-Open No. Sho 63-145268 8) Med. Chem. 29, 2363 (1986)
9) J. et al. Fluorin Chem. 28, 361 (1985)
10) JP 63-198664 11) JP 63-264461 12) JP 63-104974 13) European Patent Application 230948 14) JP 2-282384 15) Japanese National Publication No. Hei 3-502452 16). Het. Chem. 27, 1609 (1990)

  The compound of the present invention thus obtained is isolated and purified according to a conventional method. Depending on the isolation and purification conditions, it can be obtained in the form of a salt, a free carboxylic acid or a free amine, which are converted to each other as desired to produce the desired form of the compound of the present invention.

  The compound (1) of the present invention or a salt thereof is formulated as an antibacterial agent together with a pharmaceutically acceptable carrier for parenteral administration such as injection, rectal administration, ophthalmic administration, oral administration in a solid or liquid form, etc. can do.

  Examples of the form of the antibacterial composition of the present invention for injection include pharmaceutically acceptable sterile water or non-aqueous solution, suspension or emulsion. Examples of suitable non-aqueous carriers, diluents, solvents or vehicles include propylene glycol, polyethylene glycol, vegetable oils such as olive oil and injectable organic esters such as ethyl oleate. Such compositions can also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents. These compositions can be reduced, for example, by filtration through a bacteria retaining filter or by incorporating the sterilizing agent in the form of a sterile solid composition that can be dissolved in a sterilizing agent or some other sterilized injectable medium immediately before use. Can be fungus.

  In preparations for eye drop administration, a solubilizing agent, preservative, isotonic agent, thickener and the like can be preferably added in addition to the compound of the present invention.

  Solid preparations for oral administration include capsules, tablets, pills, powders and granules. In preparing this solid preparation, the compound of the present invention is generally mixed with at least one inert diluent such as sucrose, lactose or starch. This formulation may also use additional materials other than inert diluents, such as lubricants (eg, magnesium stearate) in normal formulations. In the case of capsules, tablets and pills, a buffering agent may be further used. Tablets and pills may be enteric coated.

  Liquid dosage forms for oral administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups and elixirs containing inert diluents commonly used by those skilled in the art, such as water. In addition to such inert diluents, the composition may also contain adjuvants such as wetting agents, emulsifying agents, suspending agents, and sweetening, flavoring and flavoring agents. Formulations for rectal administration may preferably contain excipients such as cocoa butter or suppository waxes in addition to the compound of the present invention.

  The dosage of the compound (1) of the present invention depends on the properties of the compound to be administered, the administration route, the desired treatment period and other factors, but is generally about 0.1 to 1000 mg / kg per day in adults, especially about 0.5-100 mg / kg is preferred. If desired, this daily dose can be divided into 2 to 4 doses.

Hereinafter, although an example and a reference example explain the present invention still in detail, the present invention is not limited to these.

[Reference Example 1]
Ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,4,6-trifluorophenyl) -1,8-naphthyridine-3-carboxylate:
Ethyl 2- (2,6-dichloro-5-fluoronicotinoyl) -3-ethoxyacrylate 6.40 g of toluene solution 10 ml of toluene solution under ice cooling, 5 ml of 2,4,6-trifluoroaniline 1.39 ml of toluene solution Add dropwise and stir overnight at room temperature. The solvent was distilled off, ethanol was added and the crystals were collected by filtration and washed with diethyl ether to give ethyl 2,6-dichloro-5-fluoronicotinoyl-3-trifluorophenylaminoacrylate. 0.63 g of potassium carbonate was added to a solution of 2.0 g of ethyl 2,6-dichloro-5-fluoronicotinoyl-3- (2,4,6-trifluorophenylamino) acrylate in N, N-dimethylformamide (9 ml). The mixture was stirred at room temperature for 90 minutes. The reaction solution was poured into ice water and the precipitated solid was collected by filtration and washed with ethanol and diethyl ether to obtain 1.38 g of the title compound.
Property: Colorless powder Melting point: 158-160 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.42 (q, J = 7 Hz, 2H), 6.92-7.06 (m, 2H), 8.48 (d, J = 11 Hz, 1H) ), 8.49 (s, 1H)

[Reference Example 2]
Ethyl 7-chloro-1- (2-chloro-4-fluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 1 except that 2-chloro-4-fluoroaniline was used.
Properties: Colorless powder Melting point: 177-178 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.41 (q, J = 7 Hz, 2H), 7.23 (dd, J = 3 Hz, 8 Hz, 1H), 7.36-7.51 (m , 2H), 8.49 (d, J = 7 Hz, 1H), 8.49 (s, 1H)

[Reference Example 3]
Ethyl 1- (2-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
Ethyl 2- (2,4,5-trifluorobenzoyl) -3-ethoxyacrylate 2 ml of chloroform solution 1.2 ml of 2-chloro-4-fluoroaniline was added dropwise to 13 ml of chloroform solution 2.46 g, Stir overnight at room temperature. The solvent was distilled off, ethanol was added, the crystals were collected by filtration, washed with diethyl ether, and ethyl 2- (2,4,5-trifluorobenzoyl) -3- (2-chloro-4-fluorophenylamino) acrylate was added. Obtained. To 15 ml of an N, N-dimethylformamide solution of 3.00 g of this ethyl 2- (2,4,5-trifluorobenzoyl) -3- (2-chloro-4-fluorophenylamino) acrylate, 1.03 g of potassium carbonate was added. Stir at room temperature for 90 minutes. The reaction solution was poured into ice water and the precipitated solid was collected by filtration and washed with ethanol and diethyl ether to obtain 2.74 g of the title compound.
Property: Colorless scaly crystal Melting point: 220 ° C. (decomposition)
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.39 (q, J = 7 Hz, 2H), 6.54 (dd, J = 6 Hz, 11 Hz, 1H), 7.46 (dd, J = 3 Hz) , 7 Hz, 1H), 7.56 (dd, J = 5 Hz, 9 Hz, 1H), 7.50-7.64 (m, 2H), 8.25-8.38 (m, 1H), 8.34 (S, 1H)

[Reference Example 4]
Ethyl 7-chloro-1- (4-chloro-2-fluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 1 except that 4-chloro-2-fluoroaniline was used.
Property: Colorless powder Melting point: 216-218 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.34-7.45 (m, 3H) 8.47 (d, J = 9 Hz, 1H) , 8.55 (s, 1H)

[Reference Example 5]
Ethyl 7-chloro-6-fluoro-1- (4-fluoro-2-methylphenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 1 except that 4-fluoro-2-methylaniline was used.
Properties: Colorless powder Melting point: 199-200 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 2.06 (s, 3H), 4.41 (q, J = 7 Hz, 2H), 7.05-7.17 (m, 2H), 7. 23 (d, J = 5 Hz, 1H), 8.48 (d, J = 7 Hz, 1H), 8.51 (s, 1H)

[Example 1]
Ethyl 7-chloro-1- (2,4-difluoro-5-nitrophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
2.00 g of ethyl 7-chloro-1- (2,4-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate is added to 8 ml of concentrated sulfuric acid. While stirring under ice cooling, 600 mg of potassium nitrate was added little by little. The mixture was stirred at room temperature for 30 minutes to complete the nitration, and then the reaction solution was poured into 150 ml of chloroform and 100 ml of ice water while stirring. And dried under reduced pressure. The precipitated crystals were dispersed in ethanol, collected by filtration, and washed successively with ethanol and diisopropyl ether to obtain 2.08 g of the title compound.
Properties: colorless needle crystal Melting point: 256-257 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.42 (d, J = 7 Hz, 1H), 7.37 (t, J = 9 Hz, 1H), 8.35 (t, J = 7 Hz, 1H) ), 8.49 (d, J = 7 Hz, 1H), 8.54 (s, 1H)

[Example 2]
7-Chloro-6-fluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
6.0 g of 7-chloro-1- (2,4-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid is added to 25 ml concentrated sulfuric acid, While stirring with ice cooling, 5.0 g of potassium nitrate was added little by little. The temperature was gradually raised and the mixture was stirred at 80 ° C. for 2 hours. The mixture was allowed to cool, then added to 200 g of ice water and left overnight. The precipitate was collected by filtration, washed with distilled water, ethanol and diisopropyl ether and then air-dried to obtain 6.4 g of the title compound.
Properties: colorless powder Melting point: 262-265 ° C. (decomposition)
¹ H NMR (CDCl ₃ ) δ;
8.15 (t, J = 11 Hz, 1H,), 8.79 (d, J = 7 Hz, 1H), 8.86 (t, J = 8 Hz, 1H), 9.17 (s, 1H)

Example 3
1- (2,4-Difluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
4 g of 1- (2,4-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid is added to 40 ml of concentrated sulfuric acid, and 3.6 mg of potassium nitrate is added little by little. And stirred at room temperature for 1 hour. The reaction solution was poured into ice water and stirred overnight. The precipitated solid was collected by filtration and washed with water, ethanol, and diethyl ether. 4.2 g of the title compound was obtained.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (CDCl ₃ ) δ;
7.70 (dd, J = 6 Hz, 12 Hz, 1H), 8.21 (t, J = 11 Hz, 1H), 8.36 (t, J = 9 Hz, 1H), 8.93 (t, J = 8 Hz) , 1H), 9.10 (s, 1H)

Example 4
Ethyl 1- (2,4-difluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
4.2 g of 1- (2,4-difluoro-5-nitrophenyl) -6,7-difluoro-1.4-dihydro-4-oxo-quinoline-3-carboxylic acid was added to 40 ml of dichloroethane. 7 g of oxalyl chloride was added dropwise. After completion of dropping, the mixture was stirred at room temperature for 2 hours. To this reaction solution, 15 ml of ethanol was added dropwise and stirred overnight at room temperature. The reaction mixture was concentrated under reduced pressure, ethanol was added to the residue, the solid was collected by filtration, and the solid was washed with diethyl ether. 3.7 g of the title compound was obtained.
Properties: Pale yellow powder Melting point: 165-173 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.74 (t, J = 7 Hz, 3H), 4.37 (q, J = 7 Hz, 2H), 7.47 (dd, J = 10 Hz, 11 Hz, 1H), 8.11-8.24 (m , 2H), 8.72 (s, 1H), 8.93 (t, J = 9 Hz, 1H)

Example 5
1- (2,4-Difluoro-5-nitrophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
1.7 g of 1- (2,4-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid is added to 10 ml of concentrated sulfuric acid and 1.5 g of potassium nitrate is added. Was added little by little, and the mixture was stirred at 60 ° C. overnight. After cooling, the mixture was poured into ice water and stirred overnight. The precipitated solid was collected by filtration and washed with water, ethanol, and diethyl ether. 1.7 g of the title compound was obtained.
Properties: Pale yellow powder Melting point: 245-255 ° C
¹ H NMR (d ₆ -DMSO) δ;
8.17 (t, J = 10 Hz, 1H), 8.26 (t, J = 9 Hz, 1H), 8.97 (s, 1H), 9.00 (t, J = 8 Hz, 1H)

Example 6
Ethyl 1- (2,4-difluoro-5-nitrophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboquinate:
Similar to Example 4 except that 1- (2,4-difluoro-5-nitrophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used. To give the title compound.
Properties: Colorless powder Melting point: 210-217 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.26 (q, J = 7 Hz, 2H), 8.07 (t, J = 11 Hz, 1H), 8.16 (t, J = 10 Hz, 1H) ), 8.64 (s, 1H), 9.00 (t, J = 8 Hz, 1H)

Example 7
7-Chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -1,8-naphthyridine-3-carboxylic acid:
Add 890 mg of 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluorophenyl) -1,8-naphthyridine-3-carboxylic acid to 10 ml of concentrated sulfuric acid, 730 mg of potassium nitrate was added little by little, and the mixture was stirred at room temperature for 2 days. After cooling, the mixture was poured into ice water and stirred overnight. The precipitated solid was collected by filtration and washed with water, ethanol, and diethyl ether. 860 mg of the title compound was obtained.
Property: Yellow powder Melting point: 216-221 ° C
¹ H NMR (d ₆ -DMSO) δ;
8.72-8.84 (m, 2H), 9.11 (s, 1H)

Example 8
Ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -1,8-naphthyridine-3-carboxylate:
Besides using 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -1,8-naphthyridine-3-carboxylic acid Gave the title compound as in Example 4.
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.42 (q, J = 7 Hz, 2H), 8.18-8.26 (m, 1H), 8.59 (d, J = 8 Hz, 1H) ), 8.54 (s, 1H)

Example 9
6,7-Difluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -quinoline-3-carboxylic acid:
Add 830 mg of 6,7-difluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluorophenyl) -quinoline-3-carboxylic acid to 10 ml of concentrated sulfuric acid, and gradually add 710 mg of kaliwam nitrate. In addition, the mixture was stirred at 100 ° C. for 3 days. After cooling, the mixture was poured into ice water and stirred overnight. The precipitated solid was collected by filtration and washed with water, ethanol, and diethyl ether. 700 mg of the title compound were obtained.
Properties: Pale yellow powder Melting point:> 215 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
7.76 (dd, J = 6 Hz, 11 Hz, 1H), 8.37 (t, J = 9 Hz, 1H), 8.85 (t, J = 6 Hz, 1H), 9.07 (s, 1H)

Example 10
Ethyl 6,7-difluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -quinoline-3-carboxylate:
Similar to Example 4 except that 6,7-difluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -quinoline-3-carboxylic acid was used. To give the title compound.
Property: Colorless powder Melting point: 106-115 ° C
¹ H NMR (CDCl ₃ ) δ;
1.27 (t, J = 7 Hz, 3H), 4.24 (q, J = 7 Hz, 2H), 7.53 (dd, J = 6 Hz, 11 Hz, 1H), 8.16 (t, J = 10 Hz) , 1H), 8.69 (s, 1H), 8.83 (t, J = 8 Hz, 1H)

Example 11
Ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,4,6-trifluoro-3-nitrophenyl) -1,8-naphthyridine-3-carboxylate:
Example except that ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,4,6-trifluorophenyl) -1,8-naphthyridine-3-carboxylate was used 1 gave the title compound.
Properties: Yellow powder Melting point: 177-184 ° C
¹ H NMR (CDCl ₃ ) δ;
1.42 (t, J = 7 Hz, 3H), 4.43 (q, J = 7 Hz, 2H), 7.24 (t, J = 11 Hz, 2H), 8.49 (s, 1H), 8. 50 (d, J = 10Hz, 1H)

Example 12
Ethyl 7-chloro-1- (2-chloro-4-fluoro-5-nitrophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Example 1 except that ethyl 7-chloro-1- (2-chloro-4-fluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was used To give the title compound.
Properties: colorless needle crystal Melting point: 237-242 ° C. (decomposition)
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.62 (d, J = 10 Hz, 1H), 8.19 (d, J = 8 Hz, 1H) ), 8.50 (d, J = 8 Hz, 1H), 8.55 (s, 1H)

Example 13
Ethyl 1- (2-chloro-4-fluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was prepared in the same manner as in Example 1 except that ethyl 1- (2-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used. Obtained.
Property: Light yellow needle crystal Melting point: 216-219 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 6.53 (dd, J = 6 Hz, 12 Hz, 1H), 7.77 (d, J = 11 Hz) , 1H), 8.32 (s, 1H), 8.26-8.35 (m, 1H), 8.40 (d, J = 7 Hz, 1H)

Example 14
Ethyl 7-chloro-1- (4-chloro-2-fluoro-5-nitrophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Example 1 except that ethyl 7-chloro-1- (4-chloro-2-fluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was used To give the title compound.
Property: colorless needle crystal Melting point: 219-221 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.62 (d, J = 10 Hz, 1H), 8.19 (d, J = 8 Hz, 1H) ), 8.50 (d, J = 8 Hz, 1H), 8.55 (s, 1H)

Example 15
Ethyl 7-chloro-6-fluoro-1- (4-fluoro-2-methyl-5-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Example 1 except that ethyl 7-chloro-6-fluoro-1- (4-fluoro-2-methylphenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was used To give the title compound.
Property: Colorless powder Melting point: 215-216 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 2.19 (s, 1H), 4.43 (q, J = 7 Hz, 2H), 7.41 (d, J = 8 Hz, 1H), 8. 11 (d, J = 7 Hz, 1H), 8.50 (s, 1H), 8.52 (d, J = 8 Hz, 1H)

Example 16
Ethyl 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
280 mg of 3.0 g of ethyl 7-chloro-6-fluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Along with 10% palladium on carbon, 50 ml of dichloromethane, 30 ml of ethanol and 2 ml of concentrated hydrochloric acid were added and hydrogenated at room temperature overnight. 2 ml of pyridine was added and concentrated under reduced pressure. To the residue, 80 ml of chloroform and 10 ml of distilled water were added for liquid separation, and the chloroform layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. To the residue was added 8 ml of ethanol and allowed to stand at room temperature. Washing in this order with ethanol and diisopropyl ether gave 1.95 g of the title compound.
Properties: Colorless powder Melting point: 208-210 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.24 (q, J = 7 Hz, 2H), 7.11 (t, J = 8 Hz, 1H), 7.47 (t, J = 10 Hz, 1H) ), 8.53 (d, J = 8 Hz, 1H), 8.71 (s, 1H)

Example 17
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Ethyl 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate 4 ml of a hydrochloric acid-acetic acid mixture was added and heated to reflux for 2 hours. After adding 3 ml of distilled water and refluxing for 5 minutes, the precipitate was collected by filtration and washed with ethanol to obtain 0.54 g of the title compound.
Property: Yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
5.46 (s, 2H), 7.00 (t, J = 8 Hz, 1H), 7.43 (t, J = 10 Hz, 1H), 8.76 (d, J = 8 Hz, 1H), 8. 97 (s, 1H)

Example 18
Ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
Ethyl 1- (2,4-difluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate (3.7 g) was dissolved in acetic acid (60 ml) and 10% 400 mg of palladium on carbon was added. The mixture was stirred at room temperature for 2 days under a hydrogen atmosphere. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. Ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 2.9 g of the title compound was obtained.
Property: Yellow powder Melting point: 198-205 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (t, J = 7 Hz, 3H), 4.23 (q, J = 7 Hz, 2H), 5.52 (s, 2H), 7.01 (t, J = 9 Hz, 1H), 7. 19 (dd, J = 6 Hz, 10 Hz, 1H), 8.14 (t, J = 9 Hz, 1H), 8.54 (s, 1H)

Example 19
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
1 g of ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate is added to 8 ml acetic acid and 2 ml hydrochloric acid overnight. Heated to reflux. After allowing to cool, the reaction mixture was concentrated under reduced pressure, ethanol was added to the residue, the solid was collected by filtration, and washed with diethyl ether. 830 mg of the title compound were obtained.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.14 (t, J = 9 Hz, 1H), 7.47 (dd, J = 6 Hz, 10 Hz, 1H), 7.54 (t, J = 10 Hz, 1H), 8.34 (t, J = 10 Hz) , 1H), 8.89 (s, 1H)

Example 20
Ethyl 1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
Ethyl 1- (2,4-difluoro-5-nitrophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate (2.2 g) in 20 ml of methanol and 50 ml of acetic acid In 10 ml of dichloroethane, 200 mg of 10% palladium on carbon was added. The mixture was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. Ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 1.12 g of the title compound was obtained.
Properties: Yellow powder Melting point: 187-196 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (t, J = 7 Hz, 3H), 4.22 (q, J = 7 Hz, 2H), 5.49 (s, 2H), 7.11 (t, J = 8 Hz, 1H), 7. 42 (t, J = 10 Hz, 1H), 8.05 (t, J = 10 Hz, 1H), 8.46 (s, 1H)

Example 21
1- (3-Amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
Example 19 except that ethyl 1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used The title compound was obtained in the same manner.
Properties: Colorless powder Melting point: 256-261 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.15-7.30 (m, 1H), 7.49 (t, J = 10 Hz, 1H), 8.25 (t, J = 8 Hz, 1H), 8.77 (s, 1H)

[Example 22]
Ethyl 1- (3-amino-4,5,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Ethyl 7-chloro-6-fluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -1,8-naphthyridine-3-carboxylate 780 mg in methanol It was dissolved in 5 ml and 10 ml of acetic acid, and 80 mg of 10% palladium carbon was added. The mixture was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was removed by filtration with a Menfuran filter, and the filtrate was concentrated under reduced pressure. Ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 200 mg of the title compound were obtained.
Property: Brown powder Melting point: 165-174 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.29 (t, J = 7 Hz, 3H), 4.26 (q, J = 7 Hz, 2H), 5.82 (s, 2H), 8.55 (d, J = 8 Hz, 1H), 8. 75 (s, 1H)

Example 23
1- (3-Amino-4,5,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Ethyl 1- (3-amino-4,5,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate 600 mg in methanol It was dissolved in 30 ml, acetic acid 10 ml and dichloroethane 30 ml, and 10% palladium carbon 100 mg was added. The mixture was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. To the residue were added 4 ml of acetic acid and 1 ml of hydrochloric acid, and the mixture was stirred with heating at 100 ° C. overnight. The reaction solution was concentrated under reduced pressure, diethyl ether was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 160 mg of the title compound were obtained.
Properties: Pale yellow powder Melting point:> 242 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
6.87 (t, J = 5 Hz, 1H), 7.76 (d, J = 8 Hz, 1H), 9.02 (s, 1H)

Example 24
Ethyl 1- (3-amino-4,5,6-trifluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
Ethyl 6,7-difluoro-1,4-dihydro-4-oxo-1- (2,3,4-trifluoro-5-nitrophenyl) -quinoline-3-carboxylate (280 mg) in ethanol (10 ml), acetic acid (5 ml), dichloroethane It melt | dissolved in 5 ml and 30 mg of 10% palladium carbon was added. The mixture was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. Ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 200 mg of the title compound were obtained.
Property: Yellow powder Melting point: 116-124 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.22 (q, J = 7 Hz, 2H), 5.85 (s, 2H), 6.83 (t, J = 8 Hz, 1H), 7. 42 (dd, J = 6 Hz, 12 Hz, 1H), 8.13 (t, J = 10 Hz, 1H), 8.60 (s, 1H)

Example 25
1- (3-Amino-4,5,6-trifluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
Example 1 except that ethyl 1- (3-amino-4,5,6-trifluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used In the same manner, the title compound was obtained.
Properties: Pale yellow powder Melting point:> 211 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
5.91 (brs, 2H), 6.86 (t, J = 7 Hz, 1H), 7.68 (dd, J = 7 Hz, 11 Hz, 1H), 8.34 (t, J = 9 Hz, 1H), 8.94 (s, 1H)

Example 26
Ethyl 1- (3-amino-2,4,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Ethyl 1- (2,4,6-trifluoro-3-nitrophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was used. Otherwise in the same manner as in Example 16, the title compound was obtained.
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 6.83-7.04 (br, 2H), 7.22-7.35 (m, 1H) ), 8.48 (d, J = 8 Hz, 1H), 8.50 (s, 1H)

Example 27
1- (3-Amino-2,4,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Ethyl 1- (3-amino-2,4,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was used. Otherwise in the same manner as in Example 17, the title compound was obtained.
Property: Pale yellow powder Melting point: 222-228 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.44 (t, J = 11 Hz, 1H), 8.77 (d, J = 8 Hz, 1H), 9.21 (s, 1H)

Example 28
Ethyl 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Besides using ethyl 1- (6-chloro-4-fluoro-3-nitrophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Gave the title compound as in Example 16.
Property: Yellow powder Melting point: 206-208 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 6.86 (d, J = 8 Hz, 1H), 7.26 (d, J = 11 Hz, 1H) ), 8.48 (d, J = 8 Hz, 1H), 8.49 (s, 1H)

Example 29
1- (3-Amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Besides using ethyl 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Gave the title compound as in Example 17.
Properties: Pale yellow powder Melting point: 265-267 ° C
¹ H NMR (d ₆ -DMSO) δ;
5.81 (s, 2H), 7.07 (d, J = 8 Hz, 1H), 7.52 (d, J = 11 Hz, 1H), 8.76 (d, J = 7 Hz, 1H), 8. 93 (s, 1H)

Example 30
Ethyl 1- (3-amino-6-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
Same as Example 16 except that ethyl 1- (6-chloro-4-fluoro-3-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used. To give the title compound.
¹ H NMR (CDCl ₃ ) δ;
1.39 (t, J = 7 Hz, 3H), 4.38 (q, J = 7 Hz, 2H), 6.65 (dd, J = 5 Hz, 12 Hz, 1H), 6.91 (d, J = 9 Hz) , 1H), 7.31 (d, J = 11 Hz, 1H), 8.28 (q, J = 9 Hz, 16 Hz, 1H), 8.35 (s, 1H)

Example 31
1- (3-Amino-6-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
Same as Example 19 except that ethyl 1- (3-amino-6-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used. To give the title compound.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
5.91 (brs, 1H), 7.08 (d, J = 8 Hz, 1H), 7.34 (dd, J = 7 Hz, 11 Hz, 1H), 7.59 (d, J = 12 Hz, 1H), 8.35 (t, J = 11 Hz, 1H), 8.83 (s, 1H)

[Example 32]
Ethyl 1- (3-amino-4-chloro-6-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Besides using ethyl 1- (4-chloro-6-fluoro-3-nitrophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Gave the title compound as in Example 16.
Property: Pale yellow powder Melting point: 200-202 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 6.82 (d, J = 7 Hz, 1H), 7.29 (d, J = 11 Hz, 1H) ), 8.47 (d, J = 8 Hz, 1H), 8.55 (s, 1H)

Example 33
1- (3-Amino-4-chloro-6-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
1.00 g of ethyl 1- (3-amino-4-chloro-6-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate 132 mg of 10% palladium carbon dissolved in 10 ml of acetic acid, 10 ml of methanol and 20 ml of dichloroethane and suspended in 20 ml of acetic acid was added and stirred overnight under a hydrogen stream. Palladium carbon was filtered through a membrane filter, 10% sodium hydroxide was added to the filtrate, and the mixture was extracted with chloroform. After drying the organic layer, the solvent was distilled off, and the solid was collected by filtration to obtain 0.380 g of the title compound.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
5.76 (br, 2H), 7.03 (d, J = 9 Hz, 1H), 7.57 (d, J = 10 Hz, 1H), 8.78 (d, J = 8 Hz, 1H), 9. 00 (s, 1H)

Example 34
Ethyl 1- (3-amino-4-fluoro-2-methylphenyl) -7-chloro-6-fluoro-1,4-dihydro-oxo-1,8-naphthyridine-3-carboxylate:
Besides using ethyl 1- (4-fluoro-2-methyl-3-nitrophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Gave the title compound as in Example 16.
Property: Pale yellow powder Melting point: 212-213 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 1.91 (s, 3H), 3.79-3.96 (br, 2H), 4.40 (q, J = 7 Hz, 2H), 6. 70 (d, J = 8 Hz, 1H), 7.02 (d, J = 11 Hz, 1H), 8.50 (d, J = 11 Hz, 1H), 8.50 (s, 1H)

Example 35
1- (3-Amino-4-fluoro-2-methylphenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Besides using ethyl 1- (3-amino-4-fluoro-2-methylphenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate Gave the title compound as in Example 17.
Property: Colorless powder Melting point: 274-279 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.84 (s, 3H), 6.95 (d.J = 8 Hz, 1H), 7.19 (d, J = 12 Hz, 1H), 8.75 (d, J = 8 Hz, 1H), 8. 79 (s, 1H)

Example 36
Ethyl 7-chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
280 mg of ethyl 7-chloro-6-fluoro-1- (2,4-difluoro-5-nitrophenyl) -4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate Along with 10% palladium on carbon, 20 ml of dichloromethane, 10 ml of formic acid and 0.3 ml of concentrated hydrochloric acid were added and hydrogenated at room temperature for 5 hours. After adding 1.2 ml of acetic anhydride and allowing to stand at room temperature for 1 hour, the catalyst is filtered off and concentrated under reduced pressure. The precipitate is dispersed in ethanol and collected by filtration, washed with ethanol and diisopropyl ether in order. Obtained 65 g of the title compound.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (t, J = 7 Hz, 3H), 4.25 (q, J = 7 Hz, 2H), 7.77 (dd, J = 10 Hz, 11 Hz, 1H), 8.35 (s, 1H), 8.45 (t, J = 8 Hz, 1H), 8.54 (d.J = 8 Hz, 1H), 8.77 (s, 1H)

Example 37
7-Chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
465 mg of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid was dissolved in 1 ml of formic acid. 0.2 g of acetic anhydride was added and stirred at 60 ° C. for 1 hour. The mixture was concentrated under reduced pressure, 2 ml of ethanol was added to the residue, and the mixture was stirred at 60 ° C. for 2 hours. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 450 mg of the title compound.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.46 (brs, 1H), 7.78 (dd, J = 10 Hz, 11 Hz, 1H), 8.35 (s, 1H), 8.50 (t, J = 8 Hz, 1H), 8.76 ( d, J = 8 Hz, 1H), 9.08 (s, 1H)

Example 38
Ethyl 7-chloro-1- (2,4-difluoro-5-formylmethylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Ethyl 7-chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate 500 mg Potassium and 1.5 g of methyl iodide were added to 2.5 ml of N, N-dimethylformamide, followed by stirring at 50 ° C. for 1 hour. 40 ml of chloroform and 150 ml of distilled water were added for liquid separation, and the organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The precipitate was dispersed in ethanol and collected by filtration. 455 mg of the title compound were obtained.
Properties: colorless crystals Melting point: 264-267 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 3.34 (s, 3H), 4.42 (q, J = 7 Hz, 2H), 7.27 (t, J = 10 Hz, 1H), 7. 39 (t, J = 7 Hz, 1H), 8.35 (s, 1H), 8.49 (d, J = 7 Hz, 1H), 8.56 (s, 1H)

Example 39
Ethyl 1- (3-t-butoxycarbonylamino-2,4-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
2.0 g of N- (t-butoxycarbonyl) -2,6-difluoro-3-nitroaniline was hydrogenated in 0.2 ml of 10% palladium on carbon in 20 ml of methanol at room temperature for 3 days. After the catalyst was filtered off, the filtrate was added as it was to 20 ml of a dichloromethane solution in which 0.5 mmol / ml of ethyl 2- (2′6′-dichloro-5-fluoronicotinoyl) -3-ethoxy-acrylate was dissolved. The solution was concentrated under reduced pressure, 2.5 g of anhydrous potassium carbonate and 10 ml of N, N-dimethylformamide were added to the residue, and the mixture was stirred at 90 ° C. for 30 minutes. The mixture was allowed to cool, and 100 ml of chloroform and 400 ml of distilled water were added for liquid separation, and then the chloroform layer was washed twice with 400 ml of distilled water, dried over anhydrous magnesium sulfate, concentrated under reduced pressure, Ethanol was added and left standing. The residue was chromatographed using 150 g of silica gel (eluent, chloroform-chloroform: methanol = 7.5: 1). The precipitate from the fraction corresponding to the main product was dispersed in ethanol and collected by filtration. Of the title compound.
Properties: colorless crystals Melting point: 128-131 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 1.51 (s, 9H), 4.40 (q, J = 7 Hz, 2H), 6.11 (s, 1H), 7.16 (t, J = 11 Hz, 1H), 7.30 (t, J = 7 Hz, 1H), 8.48 (d, J = 7 Hz, 1H), 8.54 (s, 1H)

Example 40
1- (3-Amino-2,4-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
500 mg of ethyl 1- (3-t-butoxycarbonylamino-2,4-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate In addition to 8 ml of a mixture of 3N hydrochloric acid and acetic acid, the mixture was stirred and heated to reflux for 3.5 hours. 16 ml of distilled water was added and heated to reflux for 10 minutes, and then allowed to cool. 80 ml of chloroform and 10 ml of distilled water were added for liquid separation, and the chloroform layer was concentrated under reduced pressure. The precipitate was dispersed in ethanol and collected by filtration, and washed with ethanol and diisopropyl ether in this order to obtain 295 mg of the title compound.
Property: Yellow powder Melting point: 244-248 ° C (decomposition)
¹ H NMR (CDCl ₃ ) δ;
4.04 (s, 1H), 6.64 (dt, J = 5 Hz, 8 Hz, 1H), 7.02 (ddd, J = 2 Hz, 8 Hz, 10 Hz, 1H), 8.52 (d, J = 7 Hz) , 1H), 8.87 (s, 1H)

Example 41
1- (3-Benzoylamino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (310 mg) was added to 220 mg of benzoic anhydride. Together with 920 mg of N, N-dimethylformamide and stirred at 70 ° C. for 2 hours and at 100 ° C. for 2.5 hours. 50 ml of chloroform and 150 ml of distilled water were added for liquid separation, and the chloroform layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. To the residue was added 6 ml of ethanol, and the precipitate was collected by filtration, ethanol, diisopropyl ether. To give 184 mg of the title compound.
Property: Light brown powder Melting point: 260-263 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.53-7.68 (m, 3H), 7.80 (t, J = 10 Hz, 1H), 7.98 (d, J = 8 Hz, 2H), 8.11 (t, J = 7 Hz, 1H) ), 9.09 (s, 1H), 10.40 (s, 1H)

Example 42
Ethyl 7-chloro-1- (2,4-difluoro-5-methylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
Ethyl 1- (5-amino-2,4-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate 500 mg 100 mg of 37% Along with formalin, it was added to a mixture of 10 ml 1,2-dichloroethane, 5 ml methanol, 0.5 ml acetic acid and hydrogenated with 0.08 g 10% palladium on carbon (16 hours). After the catalyst was filtered off, the filtrate was concentrated under reduced pressure. The residue was dissolved in 50 ml of chloroform, washed with 50% aqueous sodium carbonate solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was chromatographed using 20 g of silica gel (eluent, chloroform) to give 150 mg of the title compound.
Properties: Light yellow needles Melting point: 226-231 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 2.89 (s, 3H), 4.41 (q, J = 7 Hz, 2H), 6.64 (t, J = 7 Hz, 1H), 7. 02 (dd, J = 9 Hz, 11 Hz, 1H), 8.47 (d, J = 7 Hz, 1H), 8.59 (s, 1H)

Example 43
7-Chloro-1- (2,4-difluoro-5-methylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
1 ml of ethyl 7-chloro-1- (2,4-difluoro-5-methylamino-phenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate In addition to a mixture of 3N hydrochloric acid and acetic acid (1: 1, v / v), the mixture was refluxed with stirring for 2 hours. 5 ml of distilled water was added and heated to reflux for an additional 10 minutes, then allowed to cool, the precipitate was dispersed in ethanol and collected by filtration, and washed with ethanol and diisopropyl ether in this order to obtain 70 mg of the title compound.
Properties: Yellow crystal Melting point: 250-252 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.69 (d, J = 5 Hz, 3H), 5.90 (brs, 1H), 7.01 (t, J = 8 Hz, 1H), 7.46 (t, J = 11 Hz, 1H), 8. 76 (d, J = 8 Hz, 1H), 8.99 (s, 1H)

Example 44
Ethyl 1- (2,4-difluoro-5-methylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate:
The title was obtained in the same manner as in Example 42 except that ethyl 1- (3-amino-4,6-difluorophenyl) -6.7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used. A compound was obtained.
Property: Yellow powder Melting point: 208-216 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (t, J = 7 Hz, 3H), 2.72 (d, J = 4 Hz, 3H), 4.23 (q, J = 7 Hz, 2H), 5.94-6.04 (m, 1H) ), 7.04 (t, J = 8 Hz, 1H), 7.19 (dd, J = 4 Hz, 10 Hz, 1H), 7.52 (t, J = 10 Hz, 1H), 8.14 (t, J = 10Hz, 1H), 8.55 (s, 1H)

Example 45
1- (2,4-Difluoro-5-methylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
The same procedure as in Example 43 except that ethyl 1- (2,4-difluoro-5-methylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylate was used. To give the title compound.
Properties: Brown powder Melting point:> 164 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.71 (s, 3H), 6.01 (brs, 1H), 7.05 (t, J = 8 Hz, 1H), 7.39-7.51 (m, 1H), 7.53 (t, J = 10 Hz, 1H), 8.34 (t, J = 9 Hz, 1H), 8.90 (s, 1H)

Example 46
Ethyl 7-chloro-1- (3-dimethylamino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
500 mg of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate 500 mg of 37% Together with formalin, it was added to a mixture of 10 ml 1,2-dichloroethane, 5 ml methanol, 0.5 ml acetic acid and hydrogenated with 0.08 g 10% palladium carbon (64 hours). After the catalyst was filtered off, the filtrate was concentrated under reduced pressure to obtain the title compound.
Properties: Yellow powder Melting point: 158-163 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 2.88 (s, 6H), 4.41 (q, J = 7 Hz, 2H), 6.85 (t, J = 7 Hz, 1H), 7. 04 (dd, J = 9 Hz, 12 Hz, 1H), 8.47 (d, J = 7 Hz, 1H), 8.57 (s, 1H)

Example 47
7-Chloro-1- (3-dimethylamino-4,6-difluoro-phenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Ethyl 7-chloro-1- (3-dimethylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxy obtained in Example 46 The total amount of the rate was added to 4 ml of a mixture of 3N hydrochloric acid and acetic acid (1: 1, v / v), and refluxed with stirring for 2 hours. The mixture was allowed to cool and concentrated under reduced pressure. The precipitate was dispersed in ethanol and collected by filtration, and washed with ethanol and diisopropyl ether in this order to obtain 295 mg of the title compound.
Properties: Pale yellow powder Melting point: 244-2470 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.79 (s, 6H), 7.41 (t, J = 8 Hz, 1H), 7.57 (dd, J = 10 Hz, 13 Hz, 1H), 8.77 (d, J = 8 Hz, 1H), 9.04 (s, 1H)

Example 48
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8- Naphthyridine-3-carboxylic acid:
1300 mg of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid, (3S) -3 -Aminopyrrolidine (600 mg) and triethylamine (1000 mg) were added to 6500 mg of N, N-dimethylformamide, followed by stirring at 90 ° C for 1 hour. After cooling, 25 ml of ethanol was added and heated to reflux for 5 minutes. The mixture was allowed to cool and the precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 1410 mg of the title compound.
Property: Light brown powder Melting point: 260-266 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.81 (m, 1H), 2.06 (m, 1H), 536 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H) , 8.06 (d, J = 13 Hz, 1H), 8.69 (s, 1H)

Example 49
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8- Naphthyridine-3-carboxylic acid triethylamine salt:
220 mg of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid, (3S) -3 -210 mg of aminopyrrolidine dihydrochloride and 400 mg of triethylamine were added to 1000 mg of N, N-dimethylformamide, and the mixture was stirred at 90 ° C for 1 hour and 30 minutes. After allowing to cool, 10 ml of ethanol was added and heated to reflux for 5 minutes. The mixture was allowed to cool and the precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 220 mg of the title compound.
Property: Light brown powder Melting point: 245-249 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.06 (t, J = 7 Hz, 9H), 1.66 (m, 1H), 1.92 (m, 1H), 3.44 (q, J = 7 Hz, 6H), 5.35 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.66 (s, 1H)

Example 50
1- (3-Amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8- Naphthyridine-3-carboxylic acid dihydrochloride:
1- (3-Amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8- 100 mg of naphthyridine-3-carboxylic acid was dissolved in 2.5 ml of 6N hydrochloric acid and then concentrated under reduced pressure. Ethanol was added to the residue, the precipitate was crushed and collected by filtration, and washed with ethanol and diisopropyl ether in this order to obtain 97 mg of the title compound.
Property: Light brown powder Melting point: 246-250 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.09 (m, 1H), 2.22 (m, 1H), 7.03 (brt, 1H), 7.39 (t, J = 10 Hz, 1H), 8.12 (d, J = 12 Hz, 1H), 8.30 (brs, 2H), 8.72 (s, 1H)

Example 51
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1,8- Naphthyridine-3-carboxylic acid formate:
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1,8- After 200 mg of naphthyridine-3-carboxylic acid and 200 mg of formic acid were stirred for about 1 minute, 200 mg of ethanol was added and stirred at 90 ° C. for 1 minute. 2 ml of ethanol was added, and the mixture was further stirred at the same temperature for 2 minutes and allowed to stand. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 154 mg of the title compound.
Property: Light brown powder Melting point: 223-226 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.75 (m, 1H), 2.00 (m, 1H), 5.36 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.35 (t, J = 11 Hz, 1H), 8.04 (d, J = 12 Hz, 1H), 8.26 (s, 1H), 9.68 (s, 1H)

Example 52
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1,8- Naphthyridine-3-carboxylic acid p-toluenesulfonate:
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1,8- 100 mg of naphthyridine-3-carboxylic acid and 55 mg of p-toluenesulfonic acid hydrate were added to 300 mg of N, N-dimethylformamide and stirred for about 5 minutes. 8 ml of diisoallopyl ether was added to the homogenized solution, stirred and allowed to stand, and the supernatant was removed by decantation. Next, 1 ml of ethanol was added and the mixture was refluxed with heating for 2 minutes and then allowed to cool. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 120 mg of the title compound.
Properties: Light brown powder Melting point: 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.02 (m, 1H), 2.24 (m, 1H), 2.28 (s, 3H), 3.89 (m, 1H), 5.37 (brs, 2H), 6.96 (t , J = 7 Hz, 1H), 7.11 (d, J = 8 Hz, 2H), 7.35 (dt, J = 2 Hz, 12 Hz, 1H), 7.47 (d, J = 8 Hz, 2H), 7 .95 (brs, 2H), 8.13 (d, J = 12 Hz, 1H), 8.72 (s, 1H)

Example 53
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-7- (3-hydroxypyrrolidin-1-yl) -4-oxo-1,8-naphthyridine-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid 150 mg, 3-hydroxypyrrolidine 100 mg 100 mg of triethylamine was added to 550 mg of N, N-dimethylformamide and stirred at 70 ° C. for 30 minutes. 8 ml of diisopropyl ether was added and the mixture was stirred and allowed to stand, and the supernatant was removed by decantation. Subsequently, 2 ml of ethanol was added and the precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 156 mg of the title compound.
Properties: Colorless powder Melting point: 251-253 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.56 (m, 1H), 1.70-1.95 (m, 3H), 2.58-2.96 (m, 4H), 4.16 (m, 1H), 4.30 (brs, 1H), 5.35 (s, 2H), 6.95 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 8.01 (d, J = 13 Hz, 1H) , 8.59 (s, 1H)

Example 54
1- (3-Amino-4,6-difluorophenyl) -7-[(3S, 4S) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3S, 4S) -3-amino-4-methylpyrrolidine dihydrochloride was used.
Properties: light brown powder
¹ H NMR (d ₆ -DMSO) δ;
0.93 (d, J = 7 Hz, 3H), 2.17 (m, 1H), 5.35 (s, 2H), 6.97 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 7.99 (d, J = 12 Hz, 1H), 8.65 (s, 1H)

Example 55
1- (3-Amino-4,6-difluorophenyl) -7-[(3R, 4R) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3R, 4R) -3-amino-4-methylpyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 214-217 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.93 (d, J = 7 Hz, 3H), 2.17 (m, 1H), 5.36 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 7.99 (d, J = 12 Hz, 1H), 8.65 (s, 1H)

Example 56
1- (3-amino-4,6-difluorophenyl) -7-[(3S, 4R) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3S, 4R) -3-amino-4-methylpyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 234-240 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.98 (d, J = 7 Hz, 3H), 1.93 (m, 1H), 3.03 (m, 1H), 5.36 (s, 2H), 6.97 (t, J = 8 Hz, 1H), 7.37 (t, J = 10 Hz, 1H), 8.04 (d, J = 12 Hz, 1H), 8.68 (s, 1H)

Example 57
1- (3-Amino-4,6-difluorophenyl) -7-[(3R, 4S) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3R, 4S) -3-amino-4-methylpyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 237-241 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.98 (d, J = 6 Hz, 3H), 1.93 (m, 1H), 3.02 (m, 1H), 5.37 (s, 2H), 6.97 (t.J = 8 Hz, 1H), 7.37 (t, J = 10 Hz, 1H), 8.03 (d, J = 13 Hz, 1H), 8.67 (s, 1H)

Example 58
1- (3-Amino-4,6-difluorophenyl) -7- (3-amino-, 4,4-dimethylpyrrolidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1 , 8-Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3-amino-4,4-dimethylpyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 267-269 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.86 (s, 3H), 0.95 (s. 3H), 2.88-3.05 (m, 1H), 5.36 (s, 2H), 6.97 (t, J = 8 Hz, 1H), 7.38 (t.J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.66 (s, 1H)

Example 59
1- (3-amino-4,6-difluorophenyl) -7- [3- (N-ethylaminomethyl) pyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1, 8-Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3- (N-ethylaminomethyl) pyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 235-244 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.01 (t, J = 7 Hz, 3H), 1.61 (m, 1H), 1.98 (m, 1H), 2.32 (m, 1H), 2.54 (q, J = 7 Hz, 2H), 5.34 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8.02 (d, J = 12 Hz.1H) , 8.67 (s, 1H)

Example 60
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-quinoline-3- carboxylic acid:
29 mg of 3S-(−)-aminopyrrolidine and 68 mg of triethylamine were added to 1 ml of dimethyl sulfoxide, stirred for 10 minutes, and 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro. 80 mg of -4-oxo-quinoline-3-carboxylic acid was added, and the mixture was heated with stirring at 100 ° C. for 2 hours. After allowing to cool, diethyl ether was added to the reaction solution, and the supernatant was removed. Ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 76 mg of the title compound were obtained.
Properties: colorless powder Melting point: 213-221 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.62-1.76 (m, 1H), 1.88-2.06 (m, 1H), 3.08 (brs, 1H), 5.53 (s, 2H), 5.92 (d, J = 8 Hz, 1H), 7.03 (t, J = 8 Hz, 1H), 7.50 (t, J = 11 Hz, 1H), 7.85 (d, J = 14 Hz, 1H), 8.61 ( s, 1H)

Example 61
1- (3-amino-4,6-difluorophenyl) -7-[(3S.4S) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that (3S, 4S) -3-amino-4-methylpyrrolidine was used.
Properties: Brown powder Melting point: 196-202 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.95 (d, J = 7 Hz, 3H), 2.20 (brs, 1H), 5.53 (s, 2H), 5.88 (d, J = 5 Hz, 1H), 7.02 (m, 1H), 7.50 (t, J = 9 Hz, 1H), 7.85 (d, J = 14 Hz, 1H), 8.60 (s, 1H)

Example 62
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-7- (pyrrolidin-1-yl) -quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that pyrrolidine was used.
Properties: colorless powder Melting point: 264-268 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.89 (brs, 4H), 5.52 (s, 2H), 5.97 (d, J = 8 Hz, 1H), 7.03 (t, J = 8 Hz, 1H), 7.49 (t, J = 10 Hz, 1H), 7.85 (d, J = 14 Hz, 1H), 8.62 (s, 1H)

Example 63
1- (3-Amino-4,6-difluorophenyl) -7-[(1S, 6S) -2,8-diazabicyclo [4.3.0] non-8-yl] -6-fluoro-1,4 -Dihydro-4-oxo-quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that (1S, 6S) -2,8-diazabicyclo [4.3.0] nonane was used.
Properties: colorless powder Melting point: 226-233 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.53-1.81 (m, 4H), 2.63 (brs, 1H), 2.88 (brs, 1H), 3.51 (m, 2H), 3.83 (brs, 2H), 5 .57 (s, 2H), 5.97 (d, J = 8 Hz, 1H), 7.05 (t, J = 9 Hz, 1H), 7.51 (t, J = 10 Hz, 1H), 7.92 (D, J = 14 Hz, 1H), 8.65 (s, 1H)

[Example 64]
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6,8-difluoro-1,4-dihydro-4-oxo-quinoline- 3-carboxylic acid:
Similar to Example 60 except that 1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used. To give the title compound.
Properties: Brown powder Melting point: 204-210 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.67 (m, 1H), 1.95 (m, 1H), 5.42 (s, 2H), 7.08 (m, 1H), 7.37 (t, J = 10 Hz, 1H), 7 .78 (d, J = 14 Hz, 1H), 8.45 (s, 1H)

Example 65
1- (3-Amino-4,6-difluorophenyl) -7- (3-hydroxypyrrolidin-1-yl) -6,8-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid :
The title compound was obtained in the same manner as in Example 60 except that 3-hydroxypyrrolidine was used.
Properties: Pale yellow powder Melting point: 144-152 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.81 (m, 2H), 3.79 (m, 1H), 4.29 (brs, 1H), 5.00 (s, 1H), 5.44 (s, 2H), 7.09 (t , J = 8 Hz, 1H), 7.39 (t, J = 10 Hz, 1H), 7.80 (d, J = 14 Hz, 1H), 8.47 (s, 1H)

Example 66
1- [3-Amino-2,4-difluorophenyl] -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8- Naphthyridine-3-carboxylic acid:
Examples except that 1- [3-amino-2,4-difluorophenyl] -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used 48 gave the title compound.
Property: Light brown powder Melting point: 268-272 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.79 (m, 1H), 2.05 (m, 1H), 5.58 (s, 2H), 6.84 (m, 1H), 7.11 (t, J = 10 Hz, 1H), 8 .07 (d, J = 13 Hz, 1H), 8.69 (s, 1H)

Example 67
1- [3-Amino-2,4-difluorophenyl] -7-[(3S, 4S) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4- Oxo-1,8-naphthyridine-3-carboxylic acid:
Examples except that 1- [3-amino-2,4-difluorophenyl] -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used 48 gave the title compound.
Properties: light brown powder
¹ H NMR (d ₆ -DMSO) δ;
0.91 (brd, 1H), 2.14 (m, 1H), 5.58 (s, 2H), 6.83 (m, 1H), 7.10 (t, J = 10 Hz, 1H), 8 .02 (d, J = 12 Hz, 1H), 8.65 (s, 1H)

Example 68
1- (3-Amino-4,5,6-trifluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1 , 8-Naphthyridine-3-carboxylic acid:
Besides using 1- (3-amino-4,5,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid Gave the title compound as in Example 60.
Properties: Brown powder Melting point:> 256 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.58-1.84 (m, 1H), 1.84-2.23 (m, 1H), 5.74 (s, 2H), 6.81 (t, J = 5 Hz, 1H), 8. 03 (d, J = 12 Hz, 1H), 8.73 (s, 1H)

Example 69
1- (3-amino-4,5,6-trifluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-quinoline -3-carboxylic acid:
Similar to Example 60 except that 1- (3-amino-4,5,6-trifluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used. To give the title compound.
Properties: Brown powder Melting point:> 270 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.61-1.81 (m, 1H), 1.89-2.15 (m, 1H), 5.88 (s, 2H), 6.88 (brs, 1H), 7.85 (d, J = 15 Hz, 1H), 8.69 (s, 1H)

Example 70
1- (3-Amino-2,4,6-trifluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1 , 8-Naphthyridine-3-carboxylic acid:
70 mg of 1- (3-amino-2,4,6-trifluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was converted to dimethyl sulfoxide It melt | dissolved in 1 ml, 3 (S) -3-aminopyrrolidine 0.018 ml triethylamine 0.04 ml was added, and it stirred at 80 degreeC for 1 hour. Diethyl ether was added to the reaction solution, and decantation was repeated twice. A small amount of ethanol was added to the residue, and after refluxing for 10 minutes, the precipitated solid was collected by filtration and washed with diethyl ether to obtain 51 mg of the title compound.
Properties: Light brown powder Melting point: 273-277 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.75-1.78 (m, 1H), 2.00-2.18 (m, 1H), 5.46 (brs, 1H), 7.39 (t, J = 10 Hz, 1H), 8. 08 (d, J = 13 Hz, 1H), 8.97 (s, 1H)

Example 71
1- (3-amino-6-chloro-4-fluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1, 8-Naphthyridine-3-carboxylic acid:
Except that 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 70.
Properties: Pale yellow powder Melting point: 249-252 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.74-1.95 (m, 1H), 2.00-2.16 (m, 1H), 5.69 (brs, 2H), 7.00 (d, J = 9 Hz, 1H), 7. 47 (d, J = 11 Hz, 1H), 8.02 (d, J = 12 Hz, 1H), 8.61 (s, 1H)

Example 72
1- (3-Amino-6-chloro-4-fluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-quinoline- 3-carboxylic acid:
Example 70 with the exception that 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used In the same manner, the title compound was obtained.
Property: Pale red powder Melting point: 177-182 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.59-1.75 (m, 1H), 1.86-2.07 (m, 1H), 5.78 (d, J = 7 Hz, 1H), 5.89 (brs, 2H), 7. 06 (d, J = 9 Hz, 1H), 7.60 (d, J = 11 Hz, 1H), 7.86 (d, J = 14 Hz, 1H), 8.56 (s, 1H)

Example 73
1- (3-amino-4-chloro-6-fluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1, 8-Naphthyridine-3-carboxylic acid:
Except that 1- (3-amino-4-chloro-6-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 70.
Properties: Brown powder Melting point:> 258 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.53-1.80 (m, 1H), 1.83-2.06 (m, 1H), 5.56 (brs, 2H), 6.99 (d, J = 7 Hz, 1H), 7. 48 (d, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.68 (s, 1H)

Example 74
1- (3-amino-4-fluoro-2-methylphenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1, 8-Naphthyridine-3-carboxylic acid:
Other than using 1- (3-amino-4-fluoro-2-methylphenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 70.
Properties: Pale brown powder Melting point:> 165 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.53-1.73 (m, 1H), 1.74-1.98 (m, 1H), 1.83 (s, 3H), 5.25 (br, 2H), 6.75 (d, J = 9 Hz, 1H), 7.09 (d, J = 13 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.48 (s, 1H)

Example 75
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
Implemented except using 7-chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 48.
Property: Light brown powder Melting point: 218-225 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.62 (m, 1H), 1.90 (m, 1H), 7.72 (t, J = 10 Hz, 1H), 8.01 (d, J = 13 Hz, 1H), 8.34 (s, 1H), 8.38 (t, J = 8 Hz, 1H), 8.71 (s, 1H)

Example 76
7-[(3S, 4S) -3-Amino-4-methylpyrrolidin-1-yl] -1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4 -Oxo-1,8-naphthyridine-3-carboxylic acid:
Implemented except using 7-chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 54.
Property: Colorless powder Melting point: 215-216 ° C
¹ H NMR (d ₆ -DN ₄ SO) δ;
0.92 (brd, 3H), 2.15 (m, 1H), 7.71 (t, J = 10 Hz, 1H), 8.01 (d, J = 12 Hz, 1H), 8.34 (s, 1H), 8.38 (t, J = 8 Hz, 1H), 8.78 (s, 1H)

Example 77
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (3-benzoylamino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
Implemented except using 1- (3-benzoylamino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 48.
Properties: Light brown powder Melting point: 197-200 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.65 (m, 3H), 1.92 (m, 1H), 7.51-7.63 (m, 3H), 7.72 (t, J = 10 Hz, 1H), 7.94-8. 07 (m, 4H), 8.78 (s, 1H)

Example 78
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (2,4-difluoro-5-methylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
Implemented except using 7-chloro-1- (2,4-difluoro-5-methylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 48.
Property: Light brown powder Melting point: 256-258 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.63 (m, 1H), 1.91 (m, 1H), 2.70 (d, J = 5 Hz, 3H), 5.79 (brs, 1H), 6.96 (t, J = 8 Hz, 1H), 7.39 (t, J = 10 Hz, 1H), 8.02 (d, J = 12 Hz, 1H), 8.68 (s, 1H)

Example 79
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (2,4-difluoro-5-methylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-quinoline-3 -Carboxylic acid:
Except that 1- (2,4-difluoro-5-methylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used, the same procedure as in Example 60 was performed. The title compound was obtained.
Property: Brown powder Melting point: 219-226 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.59-1.78 (m, 1H), 1.91-2.07 (m, 1H), 2.70 (d, J = 5 Hz, 3H), 5.91-6.04 (m, 1H) ), 7.04 (t, J = 8 Hz, 1H), 7.54 (t, J = 11 Hz, 1H), 7.86 (d, J = 14 Hz, 1H), 8.63 (s, 1H)

Example 80
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (3-dimethylamino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
Other than using 7-chloro-1- (3-dimethylamino-4,6-difluoro-phenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid The title compound was obtained in the same manner as in Example 48.
Property: Light brown powder Melting point: 248-251 ° C (decomposition)
¹ HNMR (d ₆ -DNSO) δ;
1.63 (m, 1H), 1.91 (m, 1H), 2.77 (s, 6H), 7.36 (t, J = 8 Hz, 1H), 7.49 (t, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.74 (s, 1H)

Example 81
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- [2,4-difluoro-5- (L-glycylamino) -phenyl] -6-fluoro-1,4-dihydro-4-oxo -1,8-naphthyridine-3-carboxylic acid:
700 mg of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid, (3S) -3 -450 mg of (t-butoxycarbonylamino) pyrrolidine and 400 mg of triethylamine were added to 2 ml of N, N-dimethylformamide and stirred at 70 ° C for 30 minutes. 30 ml of diisopropyl ether was added and the mixture was allowed to stand after stirring, and the supernatant was removed by decantation. This was directly used in the next reaction.
350 mg of N-Boc-glycine and 210 mg of N-methylmorpholine were added to 10 ml of dichloromethane, and 270 μl of isobutyl chloroformate was added to the mixture while stirring at −20 ° C., followed by stirring for 20 minutes. The solution was cooled to −60 ° C. and 1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3- (t-butoxycarbonylamino) pyrrolidinyl] -6-fluoro- The total amount of 4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid was added dissolved in 10 ml of dichloromethane. The temperature was slowly returned to room temperature and then heated to reflux for 2 hours. The mixture was allowed to stand overnight at room temperature, 50 ml of chloroform and 10 ml of distilled water were added, and the mixture was separated, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. One third of the foamed residue was dissolved in 6 ml of acetonitrile, 1.5 ml of 4N hydrogen chloride dioxane solution was added, and the mixture was stirred at room temperature. A precipitate was formed in about 1 minute. After stirring overnight, the precipitate was collected by filtration, dissolved in about 4 ml of distilled water and neutralized to about pH 8 by adding 10% aqueous sodium hydroxide solution little by little to produce a precipitate. The mixture was refluxed with heating for 1 hour, allowed to cool, and the precipitate was collected by filtration and washed with distilled water, ethanol and diisopropyl ether in this order to obtain 193 mg of the title compound as a colorless powder.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.65 (m, 1H), 1.92 (m, 1H), 7.73 (t, J = 11 Hz, 1H), 8.04 (d, J = 13 Hz, 1H), 838 (m, 1H) ), 8.78 (s, 1H)

Example 82
1- (3-amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3- (L-valylamino) pyrrolidin-1-yl] -1,4-dihydro-4-oxo- 1,8-naphthyridine-3-carboxylic acid:
N-Boc-L-valine (220 mg) and N-methylmorpholine (106 mg) were added to 5 ml of dichloromethane, and the mixture was stirred at −20 ° C. and 140 μl of isobutyl chloroformate was added and stirred for 20 minutes. The solution was cooled to −60 ° C. and ethyl-7-[(3S) -3-aminopyrrolidin-1-yl] -1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-4 475 mg of -oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate was added dispersed in 10 ml of dichloromethane. The mixture was slowly returned to room temperature and then stirred at 40 ° C. for 30 minutes. 20 ml of chloroform and 10 ml of distilled water were added, and the mixture was separated, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Half of the foamed residue was added to a mixture of 3 ml of 1N hydrochloric acid and 3 ml of ethanol, and the mixture was stirred at 100 ° C. for 1.5 hours. The mixture was concentrated under reduced pressure, 3 ml of 1N hydrochloric acid was added to the residue, and the mixture was stirred at 100 ° C. for 40 minutes. Concentrated under reduced pressure and the residue was dissolved in 2 ml of distilled water. A 10% aqueous sodium hydroxide solution was added little by little to neutralize to about pH 8 to produce a precipitate. 2 ml of ethanol was added and heated to reflux for 30 minutes, allowed to cool, and the precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 141 mg of the title compound.
Properties: Colorless powder Melting point: 162-167 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.78 (d, J = 7 Hz, 3H), 0.80 (d, J = 7 Hz, 3H), 1.71-1.92 (m, 2H), 1.95-2.10 (m, 1H) ), 2.88 (d, J = 6 Hz, 1H), 4.32 (brs, 1H), 5.35 (s, 2H), 6.95 (t, J = 8 Hz, 1H), 7.35 ( t, J = 10 Hz, 1H), 8.06 (d, J =) 2 Hz, 1H), 8.69 (s, 1H)

Example 83
1- (3-amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3- (L-valylamino) pyrrolidin-1-yl] -1,4-dihydro-4-oxo- 1,8-naphthyridine-3-carboxylic acid monomethanesulfonate:
1- (3-Amino-4,6 difluorophenyl) -6-fluoro-7-[(3S) -3- (L-valylamino) pyrrolidin-1-yl] -1,4-dihydro-4-oxo-1 , 8-naphthyridine-3-carboxylic acid (215 mg) was added to 4 ml of ethanol together with 24 mg of methanesulfonic acid, and the mixture was heated and refluxed for 30 minutes. The mixture was allowed to cool, and the precipitate was collected by filtration, washed with ethanol and diisopropyl ether in this order and air-dried to obtain 211 mg of the title compound.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.87 (d, J = 7 Hz, 6H), 1.84-2.18 (m, 3H), 2.31 (s, 3H), 3.45 (brs, 1H), 4.36 (brs, 1H), 5.36 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.32 (m, 1H), 8.06 (brs.2H), 8.09 (d, J = 12 Hz, 1 H). 8.64 (d, J = 7 Hz, 1H), 8.71 (s, 1H)

Example 84
1- (3-amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3- (L-leucylamino) pyrrolidin-1-yl] -1,4-dihydro-4-oxo- 1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 82 except that N-Boc-L-leucine was used.
Property: Light brown powder Melting point: 149-154 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.7 (d, J = 7 Hz, 3H), 0.82 (d, J = 7 Hz, 3H), 1.14-1.37 (m, 2H), 1.54-1.65 (m, 1H) ), 1.79-1.94 (m, 1H), 1.95-2.10 (m, 2H), 3.10 (t.J = 7 Hz, 1H), 4.28 (brd, 1H), 5.35 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7.34 (t, J = 10 Hz, 1H), 8.05 (d, J = 12 Hz, 1H), 8. 69 (s, 1H)

Example 85
1- (3-Amino-4,6-difluorophenyl) -7- (3-methylaminopiperidino) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carvone acid:
The title compound was obtained in the same manner as in Example 48 except that 3-methylaminopiberidine dihydrochloride was used.
Property: Light brown powder Melting point: 240-242 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.23-1.46 (m, 2H), 1.62-1.87 (m, 2H), 2.11 (d, J = 9 Hz, 3H), 3.82-4.18 (m, 2H) ), 5.36 (s, 2H), 6.98 (t, J = 7 Hz, 1H), 7.39 (m, 1H), 8.09 (d, J = 14 Hz, 1H), 8.71 ( s, 1H)

Example 86
1- (3-Amino-4,6-difluorophenyl) -7- (3-methylaminopiperidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that 3-methylaminopiperidine dihydrochloride was used.
Properties: colorless powder Melting point: 254-258 ° C (decomposition)
¹ H NMR (d ⁶ -DMSO) δ;
1.62 (m.2H), 1.85 (m, 1H), 1.99 (m, 1H), 2.55 (s, 3H), 2.91 (m, 1H), 5.58 (s , 2H), 6.52 (d, J = 7 Hz, 1H), 7.08 (t, J = 8 Hz, 1H), 7.52 (t, J = 10 Hz, 1H), 8.02 (d, J = 13Hz, 1H), 8.76 (s, 1H)

Example 87
1- (3-Amino-4,6-difluorophenyl) -7-piperazino-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that piperazine was used.
Properties: Light brown powder Melting point: 174-184 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.69 (m, 4H), 3.56 (m, 4H), 5.37 (s, 2H), 698 (t, J = 7Hz, 1H), 7.37 (t.J = 10Hz, 1H) ), 8.11 (d, J = 13 Hz, 1H), 8.73 (s, 1H)

Example 88
1- (3-Amino-4,6-difluorophenyl) -7- (3,5-dimethylpiperazino) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3- carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that piperazine was used.
Property: Light brown powder Melting point: 251-256 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.96 (brs, 6H), 2.57-2.90 (m, 4H), 4.08 (m, 2H), 5.39 (brs, 2H), 6.98 (t, J = 8 Hz, 1H), 7.41 (t, J = 11 Hz, 1H), 8.16 (d, J = 13 Hz, 1H), 8.78 (s, 1H)

Example 89
1- (3-Amino-4,6-difluorophenyl) -7-piperazino-6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that piperazine was used.
Property: Pale yellow powder Melting point: 192-200 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.14 (m.4H), 3.25 (m, 4H), 5.58 (brs, 2H), 6.48 (d, J = 7 Hz, 1H), 7.08 (t, J = 8 Hz, 1H), 7.51 (t, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.75 (s, 1H)

Example 90
1- (3-Amino-4,6-difluorophenyl) -7- (3-methylpiperazino) -6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid dihydrochloride:
35 mg of 3-methylpiperazine and 120 mg of triethylamine were added to 1 ml of dimethyl sulfoxide, stirred for 10 minutes, and 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxo. -80 mg of quinoline-3-carboxylic acid was added, and it heated and stirred at 100 degreeC for 2 hours. After allowing to cool, diethyl ether was added to the reaction solution, and the supernatant was removed. Ethanol and hydrochloric acid were added to the residue, and the mixture was stirred at room temperature for 30 minutes. The solution was concentrated under reduced pressure, diethyl ether was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 30 mg of the title compound were obtained.
Properties: Pale yellow powder Melting point: 206-213 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.26 (d, J = 7 Hz, 3H), 2.85-3.02 (m, 1H), 6.51 (d, J = 7 Hz, 1H), 7.08 (t, J = 8 Hz, 1H) ), 7.52 (t, J = 10 Hz, 1H), 8.04 (d, J = 13 Hz, 1H), 8.76 (s, 1H)

Example 91
1- (3-Amino-4,6-difluorophenyl) -7- (3,5-dimethylpiperazino) -6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 60 except that 3,5-dimethylpiperazine was used.
Properties: colorless powder Melting point: 202-210 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.17 (brs, 6H), 2.74 (m, 1H), 3.54 (m, 2H), 5.57 (s, 2H), 6.50 (d, J = 7 Hz, 1H), 7 .08 (t, J = 8 Hz, 1H), 7.52 (t, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.75 (s, 1H)

Example 92
1- (3-Amino-6-chloro-4-fluorophenyl) -6-fluoro-7-piperazino-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
100 mg of 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was added to 8 ml of dimethyl sulfoxide. Into the solution, 120 mg of piperazine was added and stirred at 80 ° C. for 1 hour 30 minutes. Diethyl ether was added to the reaction solution, and decantation was repeated twice. A small amount of ethanol was added to the residue, and after refluxing for 10 minutes, the precipitated solid was collected by filtration and washed with diethyl ether to obtain 19 mg of the title compound.
Properties: Brown powder Melting point: 190 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.88 (s, 4H), 3.65 (s, 4H), 5.72 (s, 2H), 7.01 (d, J = 5 Hz, 1H), 7.46 (d, J = 11 Hz, 1H), 8.17 (d, J = 13 Hz, 1H), 8.71 (s, 1H)

Example 93
1- (3-Amino-6-chloro-4-fluorophenyl) -6-fluoro-7-piperazino-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid:
Example 92 with the exception that 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid was used In the same manner, the title compound was obtained.
Properties: Pale yellow powder Melting point: 228-237 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.81 (s, 4H), 5.91 (brs, 2H), 6.30 (d, J = 7 Hz, 1H), 7.10 (d, J = 10 Hz, 1H), 7.61 (d, J = 11 Hz, 1H), 7.97 (d, J = 12 Hz, 1H), 8.69 (s, 1H)

Example 94
1- (3-Amino-4-chloro-6-fluorophenyl) -6-fluoro-7-piperazino-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Except that 1- (3-amino-4-chloro-6-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 92.
Properties: Yellowish brown powder Melting point: 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.87 (brs, 4H), 5.59 (brs, 2H), 7.00 (d, J = 7 Hz, 1H), 7.55 (d, J = 10 Hz, 1H), 8.12 (d, J = 13 Hz, 1H), 8.75 (s, 1H)

Example 95
1- (3-Amino-4-fluoro-6-methylphenyl) -6-fluoro-7-piperazino-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Except that 1- (3-amino-4-fluoro-6-methylphenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 92.
Properties: Yellowish brown powder Melting point: 239 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.08 (s, 3H), 2.68 (brs, 4H), 3.48 (brs, 4H), 5.28 (brs, 2H), 6.77 (d, J = 8 Hz, 1H), 7 .09 (d, J = 12 Hz, 1H), 8.11 (d, J = 14 Hz, 1H), 855 (s, 1H)

Example 96
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3- (formylamino) pyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1 , 8-Naphthyridine-3-carboxylic acid:
1- (3-amino-2,4-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-4-oxo-1,4-dihydro-1,8- Naphthyridine-3-carboxylic acid (210 mg) and formic acid (40 mg) were added to 600 mg of N, N-dimethylformamide, and the mixture was stirred at 120 ° C. for 1 hour. 8 ml of diisopropyl ether was added and the mixture was stirred and allowed to stand, and the supernatant was removed by decantation. Subsequently, 2 ml of ethanol was added and heated to reflux for 20 minutes, and then allowed to cool. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 180 mg of the title compound.
Properties: Light brown powder Melting point: 214-216 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.83 (m, 1H), 2.09 (m, 1H), 4.36 (m, 1H), 5.36 (s, 1H), 6.96 (t, J = 8 Hz, 1H), 7 .36 (t, J = 10 Hz, 1H), 7.96 (d, J = 4 Hz, 1H), 8.07 (d, J = 13 Hz, 1H), 8.38 (m, 1H), 8.70 (S, 1H)

[Reference Example 6]
Ethyl 8-chloro-6,7-difluoro-1- (2,4-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
5 g of ethyl 3-chloro-2,4,5-trifluorobenzoyl acetate was added to 3.9 g of ethyl orthoformate and 5.5 g of acetic anhydride, and the mixture was heated to reflux for 3 hours. After allowing to cool, the mixture was concentrated under reduced pressure, 20 ml of chloroform was added to the residue, 2.3 ml of 2,4-difluoroaniline was added dropwise under ice cooling, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure, hexane was added to the residue, the solid was collected by filtration, and ethyl 2- (3-chloro-2,4,5,6-tetrafluorobenzoyl) -3- (2,4-difluoroamino) was collected. Acrylates were obtained. To 6.3 g of this ethyl 2- (3-chloro-2,4,5,6-tetrafluorobenzoyl) -3- (2,4-difluoroamino) acrylate, 2.5 g of potassium carbonate and 20 ml of N, N-dimethylformamide And heated and stirred at 90 ° C. for 1 hour. After allowing to cool, the reaction solution was poured into ice water, and the precipitate was collected by filtration and washed with water. The precipitate was dissolved in chloroform and washed with water. After drying over magnesium sulfate and concentration under reduced pressure, diethyl ether was added to the residue and the solid was collected by filtration and washed with ethanol and diethyl ether to obtain 5.1 g of the title compound.
Property: Colorless powder Melting point: 211-212 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.02-7.12 (m, 2H), 7.44 (m, 1H), 8. 31-8.37 (m, 1H), 8.33 (s, 1H)

[Reference Example 7]
Ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that ethyl 2,3,4,5,6-pentafluorobenzoyl acetate was used.
Property: Colorless powder Melting point: 172-173 ° C
¹ H NMR (CDCl ₃ ) δ;
1.38 (t.J = 7 Hz, 3H), 4.37 (q, J = 7 Hz, 2H), 7.08 (m, 2H), 7.50 (m, 1H), 8.18 (s, 1H)

[Reference Example 8]
N-ethoxycarbonyl-2,4-difluoro-m-phenylenediamine methanesulfonate:
To 500 ml of concentrated sulfuric acid, 151 g of 2,4-difluorobenzoic acid was added, and 114 g of potassium nitrate powder was added little by little over 30 minutes while stirring with ice cooling. When stirring was continued for 1 hour, a precipitate was formed in a sherbet shape. The mixture was added to 1.5 l of ice water and stirred for 30 minutes. The precipitate was collected by filtration, washed with 1 l of distilled water, air-dried and dried under reduced pressure over phosphorus pentoxide, and 164.5 g of 2,4-difluoro- 5-Nitrobenzoic acid was obtained as colorless crystals.
6.1 g of 2,4-difluoro-5-nitrobenzoic acid was added to 20 ml of dichloromethane, 3 ml of oxalyl chloride and 4 drops of N, N-dimethylformamide were added, and the mixture was stirred for 2 hours. The bottom distilled off. The residue was dissolved in 6 ml of dichloromethane, and 2.1 g of sodium azide was added to 5 ml of N, N-dimethylformamide and added dropwise while stirring under ice-cooling. After stirring for 10 minutes and then returning to room temperature and stirring for 5 minutes, 45 ml of ethyl ether, 15 ml of n-hexane and 100 ml of distilled water were added, and the mixture was separated after shaking. The organic layer was washed with 100 ml of distilled water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. Two-thirds of the residue was separated, 6 ml of ethanol was added, and the mixture was heated in a hot water bath at 80 ° C. for 2 hours to obtain a crude ethanol solution of N-ethoxycarbonyl-2,4-difluoro-5-nitroaniline. .
14 ml of ethanol was added to the above solution, 2.0 g of methanesulfonic acid and 0.2 g of 10% palladium carbon were added, and hydrogenated overnight (15 hours) at room temperature. Since there was a precipitate, 20 ml of methanol was added and the catalyst was removed by filtration. The filtrate was concentrated under reduced pressure, and the precipitated scaly crystals were collected by filtration and washed with a mixture of ethanol and diisopropyl ether to obtain 4.0 g of the title compound as slightly red crystals.

[Reference Example 9]
N-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine:
20.3 g of 2,4-difluoro-5-nitrobenzoic acid was added to 60 ml of dichloromethane, 10 ml of oxalyl chloride and 15 drops of N, N-dimethylformamide were added, and the mixture was stirred overnight. The bottom was distilled off. The residue was dissolved in 30 ml of dichloromethane, added to 15 ml of N, N-dimethylformamide and stirred under ice-cooling, and 7.5 g of sodium acid was added little by little. After stirring for 10 minutes and then returning to room temperature and stirring for 10 minutes, 100 ml of ethyl ether, 50 ml of n-hexane and 400 ml of distilled water were added, and the mixture was separated after shaking. The organic layer was washed twice with 400 ml of distilled water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. Add 12.0 g of benzyl alcohol, concentrate under reduced pressure, add 150 ml of toluene, heat in a 40 ° C hot water bath for 2 hours, heat in a 60 ° C hot water bath for 25 hours, and in a 100 ° C hot water bath for 1 hour. After heating, the mixture was concentrated under reduced pressure to obtain crude N-benzyloxycarbonyl-2,4-difluoro-5-nitroaniline as a residue that slowly solidified.
84 g of iron powder was added to a mixed solution of 300 ml of distilled water and 200 ml of ethanol, 7 ml of concentrated hydrochloric acid was added little by little while stirring at 80 ° C., and the mixture was stirred for 5 minutes. Next, the whole amount of the above N-benzyloxycarbonyl-2,4-difluoro-5-nitroaniline was dissolved in 100 ml of ethanol and added little by little to gently reflux, followed by stirring at 80 ° C. for 15 minutes. 500 ml of benzene was added and stirred for 5 minutes. The iron powder was filtered off, washed with ethanol, 200 ml of distilled water was added, and the solution was separated by shaking. The organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure through a layer of short silica gel powder. The precipitated colorless scaly crystals were dispersed in diisopropyl ether and collected by filtration to obtain 18.2 g of the title compound.

Example 97
Ethyl 8-chloro-6,7-difluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 8-chloro-6,7-difluoro-1- (2,4-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate (2.5 g) was added to 15 ml of sulfuric acid. 950 mg of potassium nitrate was added little by little, and the mixture was stirred overnight at room temperature. The reaction solution was poured into ice water and stirred overnight at room temperature. The precipitate was collected by filtration and washed with water, ethanol and diethyl ether. 2.4 g of the title compound was obtained.
Properties: Colorless powder Melting point: 209-210 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.43 (t, J = 9 Hz, 1H), 8.30 (s, 1H), 8. 36 (m, 2H)

Example 98
Ethyl 8-chloro-6,7-difluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 8-chloro-6,7-difluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate 2 g, 200 mg palladium carbon 200 mg in dichloroethane The mixture was added to 20 ml and 10 ml of formic acid, and stirred at room temperature for 3 hours under a hydrogen stream. Acetic anhydride was added and the mixture was further stirred overnight. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. Diethyl ether was added to the residue, and the solid was collected by filtration and washed with ethanol and diethyl ether to obtain 1.9 g of the title compound.
Property: Yellow powder Melting point: 223-229 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.23 (q, J = 7 Hz, 2H), 7.76 (t, J = 10 Hz, 1H), 8.23 (t, J = 10 Hz, 1H) ), 8.33 (s, 1H), 8.47-8.60 (m, 1H), 8.51 (S, 1H)

Example 99
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
1.8 g of ethyl 8-chloro-6,7-difluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was added to 5 ml of hydrochloric acid and acetic acid. The mixture was added to 20 ml and heated to reflux for 3 hours. After allowing to cool, the mixture was concentrated under reduced pressure, ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 1.4 g of the title compound was obtained.
Properties: Pale yellow powder Melting point: 225-226.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.09 (t, J = 8 Hz, 1H), 7.43 (t, J = 11 Hz, 1H), 8.40 (t, J = 9 Hz, 1H), 8.69 (s.1H)

Example 100
Ethyl 5-benzyloxy-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 2-benzyloxy-3,4,6-trifluorobenzoyl acetate (1.35 g) was added to ethyl orthoformate (860 mg) and acetic anhydride (1.2 g), and the mixture was heated and stirred for 4 hours. After allowing to cool, the reaction solution was concentrated under reduced pressure. 20 ml of chloroform was added to the residue, and a solution of 1.2 g of N-ethoxycarbonyl-2,4-difluoro-m-phenylenediamine methanesulfonate of Reference Example 8 and 0.51 ml of triethylamine in 20 ml of methanol was added dropwise under ice cooling. After completion of dropping, the mixture was stirred at room temperature for 2 hours. The reaction solution was concentrated under reduced pressure, and 630 mg of potassium carbonate and 5 ml of N, N-dimethylformamide were added to the residue, followed by heating and stirring at 90 ° C. for 1 hour. After allowing to cool, the reaction solution was added to ice water, the precipitated solid was collected by filtration, this solid was dissolved in chloroform, and the organic layer was separated. After drying with magnesium sulfate, the solvent was distilled off. Ethanol and diethyl ether were added to the residue, and the solid was collected by filtration and washed with diethyl ether. 1.2 g of the title compound was obtained.
Property: Yellow powder Melting point: 130-134 ° C
¹ H NMR (CDCl ₃ ) δ;
1.33 (t, J = 7 Hz, 3H), 1.38 (t, J = 7 Hz, 3H), 4.26 (q, J = 7 Hz, 2H), 4.38 (q, J = 7 Hz, 2H) ), 5.32 (s, 2H), 6.41 (m, 1H), 6.97 (d, J = 3 Hz, 1H), 7.19 (dd, J = 9 Hz, 10 Hz, 1H), 7, 26-7.42 (m, 3H), 7.64 (m, 2H), 8.25 (s, 1H), 8.38 (t, J = 8Hz, 1H)

Example 101
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Ethyl 5-benzyloxy-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate 500 mg is 48% brominated The mixture was added to 5 ml of hydrogen acid and 5 ml of acetic acid and heated to reflux overnight. After allowing to cool, the mixture was concentrated under reduced pressure, ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 130 mg of the title compound were obtained.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
6.64 (dd, J = 6 Hz, 12 Hz, 1H), 6.99 (dd, J = 8 Hz, 9 Hz, 1H), 7.49 (dd, J = 10 Hz, 11 Hz, 1H), 8.77 (s) , 1H)

Example 102
Ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -6,7-difluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 2-methyl-3,4,6-trifluorobenzoyl acetate (2.6 g) was added to ethyl orthoformate (2.2 mg) and acetic anhydride (3.1 g), and the mixture was heated and stirred for 2 hours. After allowing to cool, the reaction solution was concentrated under reduced pressure. 20 ml of chloroform was added to the residue, and a solution of 2.78 g of N-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine of Reference Example 9 in 10 ml of chloroform was added dropwise under ice cooling. After completion of dropping, the mixture was stirred at room temperature for 1 hour. The reaction solution was concentrated under reduced pressure, 1.65 g of potassium carbonate and 10 ml of N, N-dimethylformamide were added to the residue, and the mixture was heated and stirred at 90 ° C. for 1 hour. After allowing to cool, the reaction solution was added to ice water, and the precipitated solid was collected by filtration. This solid was dissolved in chloroform, the organic layer was separated, dried over magnesium sulfate, and the solvent was distilled off. Ethanol and diethyl ether were added to the residue, and the solid was collected by filtration and washed with diethyl ether to obtain 2.4 g of the title compound.
Property: Yellow powder Melting point: 202-204 ° C
¹ H NMR (CDCl ₃ ) δ;
1.38 (t, J = 7 Hz, 3H), 2.92 (d, J = 3 Hz, 3H), 4.38 (q, J = 7 Hz, 2H), 5.21 (s, 2H), 6. 50 (t, J = 9 Hz, 1H), 7.08 (brs, 1H), 7.19 (t, J = 10 Hz, 1H), 7.39 (brs, 5H), 8.27 (s, 1H) , 8.38 (t, J = 8Hz, 1H)

Example 103
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
2 ml of ethyl 1- [3- (benzyloxycarbonylamino-4,6-difluorophenyl)]-6,7-difluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylate was added to 10 ml of hydrochloric acid. The mixture was added to 20 ml of acetic acid and heated to reflux for 3 hours. After allowing to cool, the mixture was concentrated under reduced pressure, ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 940 mg of the title compound were obtained.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.86 (brs, 3H), 7.07 (t, J = 8 Hz, 1H), 7.20 (m, 1H), 7.52 (t, J = 11 Hz, 1H), 8.81 (s, 1H)

Example 104
Ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Similar to Example 97 except that ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used The title compound was obtained.
Properties: Colorless powder Melting point: 235-238 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.26 (t, J = 7 Hz, 3H), 4.23 (q, J = 7 Hz, 2H), 8.15 (t, J = 10 Hz, 1H), 8.54 (s, 1H), 8. 95 (t, J = 8Hz, 1H)

Example 105
Ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Example 98 except that ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used To give the title compound.
Properties: Light brown powder Melting point: 179-182 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.25 (t, J = 7 Hz, 3H), 4.22 (q, J = 7 Hz, 2H), 7.78 (t, J = 10 Hz, 1H), 8.34 (s, 1H), 8. 44 (s, 1H), 8.55 (t, J = 8 Hz, 1H)

Example 106
Ethyl 5-benzylamino-6,7,8-trifluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 5,6,7,8-tetrafluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate 800 mg, benzylamine 0.21 ml Then, 240 mg of anhydrous potassium carbonate was added to 30 ml of toluene, and the mixture was heated to reflux overnight. After allowing to cool, the mixture was concentrated under reduced pressure, and chloroform was added to the residue, followed by washing with water. After drying over magnesium sulfate, the solvent was distilled off, diethyl ether was added to the residue, the solid was collected by filtration, and washed with diethyl ether. 600 mg of the title compound were obtained.
Property: Yellow powder Melting point: 151-156 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.24 (t, J = 7 Hz, 3H), 4.19 (q, J = 7 Hz, 2H), 4.66 (m, 2H), 7.29 (m, 2H), 7.36 (s, 3H), 7.73 (t, J = 11 Hz, 1H), 8.33 (s, 2H), 8.50 (t, J = 8 Hz, 1H)

Example 107
Ethyl 5-amino-6,7,8-trifluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 5-benzylamino-6,7,8-trifluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate 600 mg, 10% 100 mg of palladium carbon was added to 20 ml of ethanol and 10 ml of acetic acid, and the mixture was stirred at room temperature for 2 days under a hydrogen stream. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. Diethyl ether was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 420 mg of the title compound were obtained.
Property: Yellow powder Melting point:> 230 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.25 (t, J = 7 Hz, 3H), 4.20 (q, J = 7 Hz, 2H), 7.73 (t, J = 11 Hz, 1H), 7.88 (brs, 2H), 8. 30 (s, 1H), 8.34 (s, 1H), 8.49 (t, J = 8 Hz, 1H)

Example 108
5-Amino-1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Other than using ethyl 5-amino-6,7,8-trifluoro-1- (2,4-difluoro-5-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate The title compound was obtained in the same manner as in Example 99.
Property: Yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.14 (t, J = 8 Hz, 1H), 7.42 (t, J = 10 Hz, 1H), 8.50 (s, 1H)

Example 109
Ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -7-chloro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
11.8 g of ethyl 2,6-dichloronicotinoyl acetate was added to 8.8 ml of ethyl orthoformate and 13 ml of acetic anhydride, and the mixture was heated to reflux for 2 hours. The reaction solution was concentrated under reduced pressure. 20 ml of toluene was added to 3.2 g of this compound, and a solution of 3.1 g of N-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine of Reference Example 9 in 10 ml of toluene and 10 ml of ethanol was added dropwise. And stirred overnight. The reaction solution was concentrated under reduced pressure to obtain ethyl 2- (2,6-dichloronicotinoyl) -3- (3-benzyloxycarbonylamino-4,6-difluorophenylamino) acrylate. The total amount was dissolved in 10 ml of N, N-dimethylformamide, 1.39 g of potassium carbonate was added, and the mixture was stirred overnight at room temperature. The reaction solution was poured into ice water and the solid was collected by filtration and washed with ethanol and diethyl ether in this order to obtain 3.4 g of the title compound.
Properties: Colorless powder Melting point: 242-243 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.41 (q, J = 7 Hz, 2H), 5.22 (s, 2H), 7.01 (brs, 1H), 7.13 (t, J = 9 Hz, 1H), 7.37 (s, 2H), 7.40 (s, 3H), 7.50 (m, 1H), 8.35 (m, 1H), 8.54 (s, 1H) ), 8.72 (d, J = 8 Hz, 1H)

Example 110
1- (3-Amino-4,6-difluorophenyl) -7-chloro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -7-chloro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate in 1.0 g and 12 N hydrochloric acid 4 ml and 8 ml of acetic acid were added and the mixture was heated to reflux for 3 hours and stirred overnight at room temperature. The solid precipitated in the reaction solution was collected by filtration and washed with ethanol, chloroform and diethyl ether in this order to obtain 550 mg of the title compound.
Properties: Colorless powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.07 (t, J = 8 Hz, 1H), 7.44 (t, J = 10 Hz, 1H), 7.80 (d, J = 8 Hz, 1H), 8.78 (d, J = 8 Hz, 1H) ), 8.96 (s, 1H)

Example 111
7-Chloro-6-fluoro-1- (4-fluoro-3-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
1.5 g of 7-chloro-6-fluoro-1- (4-fluorophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was added to 10 ml of concentrated sulfuric acid, and potassium nitrate 1. 4g was added a little, and it heated and stirred at 80 degreeC for 2 hours. After cooling, the mixture was poured into ice water and stirred overnight. The precipitated solid was collected by filtration and washed with water, ethanol, and diethyl ether. 1.1 g of the title compound was obtained.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.89 (t, J = 10 Hz, 1H), 8.09-8.17 (m, 1H), 8.59-8.66 (m, 1H), 8.80 (d, J = 7 Hz, 1H) ), 9.08 (s, 1H)

Example 112
Methyl 7-chloro-6-fluoro-1- (4-fluoro-3-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
1 g of thionyl chloride was added dropwise to 25 ml of methanol, and 7-chloro-6-fluoro-1- (4-fluoro-3-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine was added to this solution. 1.1 g of 3-carboxylic acid was added and heated to reflux overnight. After allowing to cool, the mixture was concentrated under reduced pressure, diethyl ether was added to the residue, and the solid was collected by filtration. 1.4 g of the title compound was obtained.
Property: Yellow powder Melting point: 207-212 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.78 (s, 3H), 7.87 (d, J = 9 Hz, 1H), 8.10-8.17 (m, 1H), 8.54-8.62 (m, 2H), 8. 78 (s, 1H)

Example 113
1- (3-Amino-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
Methyl 7-chloro-6-fluoro-1- (4-fluoro-3-nitrophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate (600 mg) was added to 30 ml of methanol, 10 ml of acetic acid, Dissolved in 30 ml of dichloroethane, 100 mg of 10% palladium on carbon was added. The mixture was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was removed by filtration with a membrane filter, and the filtrate was concentrated under reduced pressure. To the residue were added 4 ml of acetic acid and 1 ml of hydrochloric acid, and the mixture was stirred with heating at 100 ° C. overnight. The reaction mixture was concentrated under reduced pressure, diethyl ether was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 160 mg of the title compound were obtained.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
6.74-6.83 (m, 1H), 6.96 (dd, J = 3 Hz, 8 Hz, 1H), 7.23 (dd, J = 9 Hz, 11 Hz, 1H), 8.76 (d, J = 8 Hz, 1H) 8.79 (s, 1H)

Example 114
Ethyl 7-chloro-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate:
3-Ethoxy-2- (2′6′-dichloro-5′-fluoronicotinoyl) acrylic acid ethyl ester prepared by a conventional method from 1.25 g of 2,6-dichloro-5-fluoronicotinoyl acetic acid ethyl ester To 10 ml of the dissolved methanol solution, 1.30 g of N-ethoxycarbonyl-2,4-difluoro-m-phenylenediamine methanesulfonate of Reference Example 8 was added together with 500 mg of triethylamine. The solution was concentrated under reduced pressure. To this, 50 ml of chloroform and 50 ml of distilled water were added, followed by liquid separation. The organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. To the residue, 2.1 g of anhydrous potassium carbonate and 4 ml of NN-dimethylformamide were added and stirred at 90 ° C. for 15 minutes. The mixture was allowed to cool, and 50 ml of chloroform and 300 ml of distilled water were added for liquid separation, and the chloroform layer was washed twice with 300 ml of distilled water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The precipitate was dispersed in ethanol, collected by filtration, and washed successively with ethanol and diisopropyl ether to obtain 647 mg of the title compound.
Properties: Light brown powder Melting point: 209-212 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.24 (t, J = 7 Hz, 3H), 1.28 (t, J = 7 Hz, 3H), 4.13 (q, J = 7 Hz, 2H), 4.24 (q, J = 7 Hz, 2H) ), 7.70 (t, J = 10 Hz, 1H), 8.03 (t, J = 8 Hz, 1H), 8.54 (d, J = 8 Hz, 1H), 8.76 (s, 1H)

Example 115
7-Chloro-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid:
1. 200 mg of ethyl 7-chloro-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate The mixture was added to 5 ml of 3N hydrochloric acid and 1 ml of acetic acid and stirred and refluxed for 3 hours and 40 minutes. The mixture was allowed to cool, and the precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 149 mg of the title compound.
Property: Pale yellow powder Melting point: 233-235 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.24 (t, J = 7 Hz, 3H), 4.13 (q, J = 7 Hz, 2H), 7.71 (t, J = 10 Hz, 1H), 8.08 (t, J = 8 Hz, 1H) ), 8.77 (d, J = 7 Hz, 1H), 9.06 (s, 1H), 9.65 (s, 1H)

Example 116
Separate synthesis of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid:
200 ml of ethyl 7-chloro-1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate In addition to 6N hydrochloric acid and 2 ml of acetic acid, the mixture was stirred and heated to reflux for 4 days. The mixture was allowed to cool, the precipitate was collected by filtration, the filtrate was concentrated under reduced pressure, 6 ml of 6N hydrochloric acid was added to the residue, and the mixture was stirred and heated to reflux for 18 hours. After concentration under reduced pressure and addition of 1 ml of ethanol, the precipitate formed upon standing was collected by filtration and washed with ethanol and diisopropyl ether in this order to give 29 mg of the title compound as a pale yellow powder.

Example 117
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3 -Carboxylic acid:
3.7 g of 1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-amino 2.18 g of azetidine dihydrochloride and 6.06 g of triethylamine were added to 200 ml of acetonitrile. Stir at 80 ° C. for 15 hours. The solid produced after cooling was collected by filtration. Washing with ethanol and isopropyl ether gave 3.7 g of the title compound.
Properties: Pale yellow powder Melting point: 168.5-170.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.60-4.60 (m, 5H), 5.35 (brs, 2H), 6.95 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8. 03 (d, J = 11.5 Hz, 1H), 8.68 (s, 1H)

Example 118
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7- (3-hydroxyazetidin-1-yl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3 -Carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-hydroxyazetidine hydrochloride The title compound was obtained in the same manner as in Example 117 except that the salt and triethylamine were used.
Properties: Pale yellow powder Melting point:> 253 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.60-4.65 (m, 5H), 5.35 (brs, 2H), 5.82 (brs, 1H), 6.95 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8.03 (d, J = 11.5 Hz, 1H), 8.68 (s, 1H)

Example 119
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7- (3-methylaminoazetidin-1-yl) -1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-methylaminoazetidine The title compound was obtained in the same manner as in Example 117 except that dihydrochloride and triethylamine were used.
Properties: colorless powder Melting point: 135.5-140.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.53 (s, 3H), 3.80-4.90 (m, 5H), 5.38 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 8.11 (d, J = 10.7 Hz, 1H), 8.70 (s, 1H)

Example 120
1- (3-Amino-4,6-difluorophenyl) -7- (3-ethylaminoazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-ethylaminoazetidine The title compound was obtained in the same manner as in Example 117 except that dihydrochloride and triethylamine were used.
Properties: Colorless powder Melting point: 122.5-124 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.98 (t, J = 7 Hz, 3H) 2.45 (q, J = 7 Hz, 2H), 3.20-4.80 (m, 5H), 5.34 (brs, 2H), 6.94 (T, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8.01 (d, J = 10.7 Hz, 1H), 8.67 (s, 1H)

Example 121
1- (3-Amino-4,6-difluorophenyl) -7- (3-dimethylaminoazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid hydrochloride:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-dimethylaminoazetidine A free form of the title compound was obtained in the same manner as in Example 117 except that dihydrochloride and triethylamine were used. 110 mg of this solid was dissolved in 5 ml of chloroform, and 2 ml of 4N hydrochloric acid / 1,4-dioxane was added. The solvent was distilled off, and 2 ml of ethanol was added to the residue. The resulting solid was collected by filtration to obtain 60 mg of the title compound.
Properties: Pale yellow powder Melting point:> 242 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.72 (s, 6H), 3.90-4.80 (m, 5H), 5.20-6.70 (br, 2H), 7.18 (t, J = 8 Hz, 1H), 7. 45 (t, J = 10 Hz, 1H), 8.13 (d, J = 11.1 Hz, 1H), 8.73 (s, 1H)

Example 122
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7- (trans-2-methyl-3-aminoazetidin-1-yl) -1,4-dihydro-4-oxo-1 , 8-Naphthyridine-3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and trans-2-methyl- The title compound was obtained in the same manner as in Example 117 except that 3-aminoazetidine dihydrochloride and triethylamine were used.
Properties: Pale yellow powder Melting point:> 237 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.90-1.35 (m, 3H), 3.20-3.55 (m, 2H), 3.80-4.60 (m, 2H), 5.37 (brs, 2H), 6. 85-7.05 (m, 1H), 7.25-7.50 (m, 1H), 8.09 (d, J = 9 Hz, 1H), 8.72 (s, 1H)

Example 123
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3 -Carboxylic acid p-toluenesulfonate:
The title compound was obtained in the same manner as in Example 52 except that the compound 117 was used.
Property: Pale red powder Melting point: 179-184 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.28 (s, 3H), 3.50-4.80 (m, 5H), 6.96 (t, J = 8 Hz, 1H), 7.11 (d, J = 8 Hz, 1H), 7. 37 (t, J = 10 Hz, 1H), 7.48 (d, J = 8 Hz, 1H), 8.12 (d, J = 11.1 Hz, 1H), 8.30 (brs, 3H), 8. 74 (s, 1H)

Example 124
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3 -Carboxylic acid methanesulfonate:
The title compound was obtained in the same manner as in Example 52 except that the compound 117 and methanesulfonic acid were used. Properties: Pale red powder Melting point:> 214 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.34 (s, 3H), 3.80-4.80 (m, 5H), 6.96 (t, J = 8 Hz, 1H), 7.37 (t, J = 10 Hz, 1H), 8. 14 (d, J = 11.2 Hz, 4H), 8.31 (brs, 3H), 8.74 (s, 1H)

Example 125
7- (3-Amino-3-methylazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-amino-3- The title compound was obtained in the same manner as in Example 117 except that methylazetidine dihydrochloride and triethylamine were used.
Properties: colorless powder Melting point: 244-246.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.42 (s, 3H), 3.20-4.55 (m, 4H), 5.37 (brs, 2H), 6.95 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 8.07 (d, J = 11.1 Hz, 1H), 8.71 (s, 1H)

Example 126
7- (3-L-alanylaminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8 -Naphthyridine-3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-L-alanyl The title compound was obtained in the same manner as in Example 117 except that aminoazetidine dihydrochloride and triethylamine were used.
Properties: Pale yellow powder Melting point: 208.5-214 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (d, J = 6.8 Hz, 3H), 3.55-3.75 (m, 1H), 3.70-4.80 (m, 5H), 5.38 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 8.07 (d, J = 11.1 Hz, 1H), 8.70 (s, 1H), 9.07 (brs, 1H)

Example 127
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7- (3-L-valylaminoazetidin-1-yl) -1,4-dihydro-4-oxo-1,8- Naphthyridine-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-L-valylamino The title compound was obtained in the same manner as in Example 117 except that azetidine dihydrochloride and triethylamine were used.
Property: Colorless powder Melting point: 262.5-264.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.78 (d, J = 7 Hz, 3H), 0.85 (d, J = 7 Hz, 3H), 1.70-1.95 (m, 1H), 2.91 (d, J = 5.5 Hz) , 1H), 3.70-4.80 (m, 5H), 5.35 (brs, 2H), 6.95 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H) ), 8.06 (d, J = 11.1 Hz, 1H), 8.52 (brs, 1H), 8.69 (s, 1H)

Example 128
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7- (3-methylaminopyrrolidin-1-yl) -4-oxo-1,4-dihydro-1,8-naphthyridine-3 -Carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3-methylaminopyrrolidine dihydrochloride was used.
Properties: colorless powder Melting point: 273-276 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.79 (m, 1H), 1.93 (m, 1H), 2.24 (s, 3H), 5.35 (brs, 2H), 6.96 (t, J = 8 Hz, 1H), 7 .36 (t, J = 10 Hz, 1H), 8.03 (d, J = 12 Hz, 1H), 8.68 (s, 1H)

Example 129
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3- (methylamino) pyrrolidin-1-yl] -4-oxo-1,4-dihydro-1 , 8-Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3S) -3- (methylamino) pyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 246-248 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.79 (m, 1H), 1.92 (m, 1H), 2.23 (s, 3H), 3.18 (m, 2H), 5.35 (brs, 2H), 6.97 (t , J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 8.02 (d, J = 13 Hz, 1H), 8.68 (s, 1H)

Example 130
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3- (ethylamino) pyrrolidin-1-yl] -4-oxo-1,4-dihydro-1 , 8-Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that (3S) -3- (ethylamino) pyrrolidine dihydrochloride was used.
Property: Light brown powder Melting point: 248-251 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.98 (t, J = 7 Hz, 3H), 1.75 (m, 1H), 1.95 (m, 1H), 5.35 (brs, 2H), 6.96 (t, J = 8 Hz, 1H), 7.36 (t, J = 11 Hz, 1H), 8.01 (d, J = 12 Hz, 1H), 8.67 (s, 1H)

Example 131
1- (3-Amino-4,6-difluorophenyl) -7- (3-amino-3-methylpyrrolidin-1-yl) -6-fluoro-4-oxo-1,4-dihydro-1,8- Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3-amino-3-methylpyrrolidine dihydrochloride was used.
Properties: Colorless powder Melting point: 223-225 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.20 (d, J = 3 Hz, 3H), 1.60 (m, 1H), 1.71 (m, 1H), 5.35 (brs, 2H), 6.96 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 7.99 (d, J = 13 Hz, 1H), 8.63 (s, 1H)

Example 132
1- (3-amino-4,6-difluorophenyl) -7- (3-aminomethylpyrrolidin-1-yl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3 -Carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3-aminomethylpyrrolidine dihydrochloride was used.
Property: Colorless powder Melting point: 205-210 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.42-1.98 (m, 2H), 2.60 (d, J = 7 Hz, 2H), 5.34 (s, 2H), 6.96 (t, J = 8 Hz, 1H), 7. 35 (t, J = 10 Hz, 1H), 8.01 (d, J = 12 Hz, 1H), 8.66 (s, 1H)

Example 133
1- (3-Amino-4,6-difluorophenyl) -7- (4-aminopiperidin-1-yl) -6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3- carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 4-aminopiperidine dihydrochloride was used.
Property: Colorless powder Melting point: 212-215 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.28 (m, 2H), 1.74 (m, 2H), 2.95 (m, 1H), 3.10 (m, 2H), 4.06 (m, 2H), 5.39 (s , 2H), 6.97 (t, J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H). 8.06 (d, J = 12 Hz, 1H), 8.67 (s, 1H)

Example 134
1- (3-amino-4.6-difluorophenyl) -7- (cis-3-amino-4-methoxypyrrolidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1, 8-Naphthyridine-3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that cis-3-amino-4-methoxypyrrolidine was used.
Properties: Pale yellow powder Melting point:> 164 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.13 (s, 3H), 3.73 (m, 2H), 3.93 (m, 1H), 5.38 (brs, 2H), 6.97 (m, 1H), 7.37 (m , 1H), 8.10 (d, J = 12 Hz, 1H), 8.71 (s, 1H)

Example 135
1- (3-amino-4,6-difluorophenyl) -6-fluoro-7- (3- (2-hydroxyethylamino) pyrrolidine) -1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid:
The title compound was obtained in the same manner as in Example 48 except that 3- (2-hydroxyethylamino) pyrrolidine dihydrochloride was used.
Properties: Pale yellow powder Melting point:> 235 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.65-2.13 (m, 2H), 2.52-2.70 (m, 2H), 3.42-3.58 (m, 2H), 4.55-4.73 (m, 1H) ), 5.36 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7.36 (t, J = 11 Hz, 1H), 8.04 (d, J = 13 Hz, 1H), 8.69 (s, 1H)

Example 136
1- (3-Amino-4,6-difluorophenyl) -7- (7-amino-5-azaspiro [2.4] heptan-5-yl) -6-fluoro-1,4-dihydro-4-oxo -1,8-naphthyridine-3-carboxylic acid hydrochloride:
7-tert-Butyloxycarbonylamino-5-azaspiro [2.4] heptane B-form 173 mg and triethylamine 164 mg were added to 2 ml of dimethyl sulfoxide, and 1- (3-amino-4,6-difluoro was heated and stirred at 80 ° C. Phenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (200 mg) was added and the mixture was stirred overnight.
After allowing to cool, diethyl ether was added to the reaction solution, and the diethyl ether layer was concentrated under reduced pressure. Chloroform was added to the residue, washed with water, dried over magnesium sulfate, and the solvent was distilled off. Diethyl ether was added to the residue, and the solid was collected by filtration. To this solid was added 30 ml of chloroform and 5 ml of 4N hydrochloric acid-dioxane, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure, diethyl ether was added to the residue, and the solid was collected by filtration and washed with diethyl ether. 120 mg of the title compound were obtained.
Properties: Yellow powder Melting point:> 222 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.78 (m, 4H), 3.26-4.44 (m, 6H), 7.09 (m, 1H), 7.41 (m, 1H), 8.12 (d, J = 13 Hz, 1H), 8.35 (brs, 3H), 8.73 (s, 1H)

Example 137
7- (3-Aminoazetidin-1-yl) -6-fluoro-1- (2,4-difluoro-5-methylaminophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine- 3-carboxylic acid:
7-Chloro-6-fluoro-1- (2,4-difluoro-5-methylaminophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-aminoazetidine The title compound was obtained in the same manner as in Example 117 except that dihydrochloride and triethylamine were used.
Properties: Pale yellow powder Melting point:> 231 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.69 (d, J = 4.3 Hz, 3H), 3.80-4.80 (m, 5H), 5.83 (brs, 1H), 6.96 (t, J = 8 Hz, 1H), 7.41 (t, J = 11 Hz, 1H), 8.14 (d, J = 12 Hz, 1H), 8.20-8.60 (br, 2H), 8.76 (s, 1H)

Example 138
7-[(3S) -3-Aminopyrrolidin-1-yl] -1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -6-fluoro-4-oxo-1,4-dihydro-1, 8-Naphthyridine-3-carboxylic acid:
68 mg of 1- (3-ethoxycarbonylamino-4,6-difluorophenyl) -7-chloro-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid, (3S) 70 mg of -3-aminopyrrolidine was added to 350 μl of N, N-dimethylformamide and stirred at 80 ° C. for 20 minutes. Subsequently, 0.5 ml of ethanol was added and the mixture was allowed to cool. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 73 mg of the title compound.
Properties: Colorless powder Melting point:> 280 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.23 (t, J = 7 Hz, 3H), 1.34 (m, 1H), 1.53-1.95 (m, 3H), 2.42 (m), 2.74 (m), 4 .12 (q, J = 7 Hz, 2H), 7.63 (t, J = 10 Hz, 1H), 7.95 (t, J = 8 Hz, 1H), 7.99 (d, J = 7 Hz, 1H) , 8.63 (s, 1H)

[Example 139]
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
While stirring a solution of 61 mg of 3-aminoazetidine dihydrochloride and 119 mg of N-methylpyrrolidine in 3 ml of acetonitrile at 80 ° C., 1- (3-amino-4,6-difluorophenyl) -7-chloro-1, 4-Dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid (100 mg) was added, and the mixture was stirred at 80 ° C. for 2 hours and 50 minutes. The reaction solution was allowed to cool and then decanted with diethyl ether. A small amount of ethanol was added to disperse the solid and collected by filtration. The solid was washed with ethanol and diethyl ether in this order to obtain 63 mg of the title compound.
Properties: Pale yellow powder Melting point:> 240 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.50-4.48 (br, 5H), 5.35 (brs, 2H), 6.73 (d, J = 9 Hz, 1H), 6.96 (t, J = 9 Hz, 1H), 7. 35 (t, J = 10 Hz, 1H), 8.32 (d, J = 9 Hz, 1H), 8.69 (s, 1H)

Example 140
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -1,4-dihydro-4-oxo-1,8-naphthyridine-3- carboxylic acid:
The title compound was obtained in the same manner as in Example 139 except that (3S) -3-aminopyrrolidine was used.
Properties: Light reddish brown powder Melting point:> 261 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.53-1.84 (m, 1H), 1.84-2.15 (m, 1H), 5.33 (brs, 2H), 6.82 (t, J = 10 Hz, 1H), 6. 97 (t, J = 8 Hz, 1H), 7.35 (t, J = 10 Hz, 1H), 8.28 (d, J = 10 Hz, 1H), 8.65 (s, 1H)

[Example 141]
1- (3-Amino-6-chloro-4-fluorophenyl) -7- (3-aminoazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine -3-carboxylic acid:
Except that 1- (3-amino-6-chloro-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 139.
Property: Pale yellow powder Melting point: 200-203 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.70-4.48 (br, 3H), 5.69 (brs, 2H), 6.96 (d, J = 8 Hz, 1H), 7.46 (d, J = 12 Hz, 1H), 8. 04 (d, J = 12 Hz, 1H), 8.62 (s, 1H)

Example 142
1- (3-Amino-6-methyl-4-fluorophenyl) -7- (3-aminoazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine -3-carboxylic acid:
Except that 1- (3-amino-6-methyl-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid was used The title compound was obtained in the same manner as in Example 117.
Properties: Pale yellow powder Melting point:> 238 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.82 (s, 3H), 2.94-4.28 (br, 5H), 5.27 (brs, 3H), 6.74 (d, J = 9 Hz, 1H), 7.09 (d, J = 12 Hz, 1H), 8.09 (d, J = 10 Hz, 1H), 8.52 (s, 1H)

[Example 143]
1- (3-Amino-4-fluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid:
1- (3-amino-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, (3S) -3-aminopyrrolidine The title compound was obtained in the same manner as in Example 60 except that
Properties: Brown powder Melting point: 262-265 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.56-1.83 (m, 1H), 1.86-2.09 (m, 1H), 5.50 (brs, 2H), 6.67-6.78 (m, 1H), 6. 92 (d, J = 9 Hz, 1H), 7.17 (t, J = 12 Hz, 1H), 8.03 (d, J = 13 Hz, 1H), 8.53 (s, 1H)

[Example 144]
1- (3-Amino-4-fluorophenyl) -7-[(3S, 4S) -3-amino-4-methylpyrrolidin-1-yl] -6-fluoro-1,4-dihydro-4-oxo- 1,8-naphthyridine-3-carboxylic acid:
1- (3-amino-4-fluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, (3S, 4S) -3- The title compound was obtained in the same manner as in Example 60 except that amino-4-methylpyrrolidine was used.
Properties: Brown powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.96 (d, J = 7 Hz, 3H), 2.12 (brs, 1H), 5.50 (s, 2H), 6.68-6.76 (m, 1H), 6.89-7. 01 (m, 1H), 7.19 (t, J = 11 Hz, 1H), 8.03 (d, J = 13 Hz, 1H), 8.53 (s, 1H)

Example 145
1- (3-Amino-4,6-difluorophenyl) -7- (cis-3-hydroxy-4-methylpyrrolidin-1-yl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, cis-3-hydroxy-4-methylpyrrolidine was used. The title compound was obtained in the same manner as in Example 60 except for the above.
Properties: Brown powder Melting point: 174-180 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.94 (d, J = 7 Hz, 3H), 2.11 (m, 1H), 2.86-3.81 (m, 4H), 3.86 (m, 1H), 5.18 (brs, 2H), 5.93 (d, J = 6 Hz, 1H), 7.04 (t, J = 8 Hz, 1H), 7.50 (t, J = 10 Hz, 1H), 7.86 (d, J = 13Hz, 1H), 8.62 (s1H)

Example 146
1- (3-Amino-4,6-difluorophenyl) -7- (trans-3-amino-4-methylpyrrolidin-1-yl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, trans-3-amino-4-methylpyrrolidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that
Properties: Pale yellow powder Melting point:> 164 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.09 (d, J = 7 Hz, 3H), 2.28 (m, 1H), 2.97-3.91 (m, 5H), 5.58 (brs, 2H), 5.96 (d, J = 7 Hz, 1H), 7.05 (t, J = 8 Hz, 1H), 7.52 (t, J = 10 Hz, 1H), 7.92 (d, J = 14 Hz, 1H), 8.66 ( s1H)

[Example 147]
1- (3-Amino-4,6-difluorophenyl) -6-fluoro-7-[(3S) -3-methylaminopyrrolidin-1-yl] -1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
Besides using 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3-methylaminopyrrolidine Gave the title compound as in Example 60.
Properties: Pale yellow powder Melting point: 188-199 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.86 (brs, 1H), 2.00 (brs, 1H), 2.30 (s, 3H), 3.11-3.66 (m, 5H), 5, 54 (brs, 2H), 5 .95 (d, J = 7 Hz, 1H), 7.04 (t, J = 8 Hz, 1H), 7.50 (t, J = 11 Hz, 1H), 7.86 (d, J = 14 Hz, 1H) , 8.63 (s, 1H)

Example 148
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Other than using 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60.
Properties: Colorless powder Melting point:> 183 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.76 (brs, 2H), 3.91 (m, 1H), 4.24 (brs, 2H), 5.55 (brs, 2H), 5.77 (d, J = 7 Hz, 1H), 7 .02 (t, J = 8 Hz, 1H), 7.50 (t, J = 10, 1H), 7.88 (d, J = 12 Hz, 1H), 8.64 (s, 1H)

[Example 149]
1- (3-amino-4,6-difluorophenyl) -7- (trans-3-amino-4-hydroxypyrrolidin-1-yl) -6,8-difluoro-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, trans-3-amino-4-hydroxypyrrolidine The title compound was obtained in the same manner as in Example 60 except that dihydrochloride was used.
Properties: Brown powder Melting point:> 145 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.92-4.26 (m, 4H), 5.46 (brs, 2H), 7.10 (t, J = 9 Hz, 1H), 7.40 (t, J = 11 Hz, 1H), 7. 86 (d, J = 14 Hz, 1H), 8.52 (s, 1H)

Example 150
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid :
1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride is used The title compound was obtained in the same manner as in Example 60 except that.
Properties: Colorless powder Melting point:> 203 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.90 (m, 1H), 4.10 (m, 1H), 4.49 (m, 2H), 5.46 (brs, 2H), 7.08 (t, J = 9 Hz, 1H), 7 .39 (t, J = 10 Hz, 1H), 7.81 (d, J = 13 Hz, 1H), 8.48 (s, 1H)

[Example 151]
1- (3-Amino-4,6-difluorophenyl) -6,8-difluoro-7- (3-hydroxyazetidin-1-yl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid :
1- (3-Amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-hydroxyazetidine hydrochloride was used. The title compound was obtained in the same manner as in Example 60 except for the above.
Properties: colorless powder Melting point: 218-225 ° C
¹ H NMR (d ₆ -DMSO) δ;
4.13 (brs, 2H), 4.50 (brs, 3H), 5.44 (brs, 2H), 5.72 (brs, 1H), 7.08 (t, J = 8 Hz, 1H), 7 .39 (t, J = 10 Hz, 1H), 7.79 (d, J = 13 Hz, 1H), 8.46 (s, 1H)

Example 152
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.75 (m, 1H), 4.10 (m, 2H), 4.66 (m, 2H), 5.43 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7 .36 (t, J = 11 Hz, 1H), 7.87 (d, J = 14 Hz, 1H), 8.44 (s, 1H)

Example 153
1- (3-Amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3-aminopyrrolidine The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point:> 205 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.17 (m, 1H), 2.09 (m, 1H), 3.02-3.81 (m, 5H), 5.41 (brs, 2H), 6.97 (m, 1H), 7 .38 (t, J = 11 Hz, 1H), 7.94 (d, J = 14 Hz, 1H), 8.50 (s, 1H)

Example 154
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6-fluoro-7- (3-hydroxyazetidin-1-yl) -1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-hydroxyazetidine hydrochloride is used The title compound was obtained in the same manner as in Example 60 except that.
Properties: Pale yellow powder Melting point: 145-150 ° C
¹ H NMR (d ₆ -DMSO) δ;
4.18 (brs, 2H), 4.47 (brs, 1H), 4.71 (brs, 2H), 5.41 (brs, 2H), 5.71 (d, J = 5 Hz, 1H), 6 .96 (t, J = 8 Hz, 1H), 7.37 (t, J = 10 Hz, 1H), 7.88 (d, J = 14 Hz, 1H), 8.44 (s, 1H)

Example 155
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6-fluoro-7-piperazino-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 60, except that 1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, piperazine was used To give the title compound.
Properties: Pale yellow powder Melting point:> 232 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.87 (brs, 4H), 3.19 (brs, 4H), 5.43 (brs, 2H), 6.97 (t, J = 8 Hz, 1H), 7.37 (t, J = 11 Hz, 1H), 8.
07 (d, J = 12 Hz, 1H), 8.54 (s, 1H)

Example 156
1- (3-Amino-4,6-difluorophenyl) -7- (3-amino-3-methylazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo Quinoline-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-amino-3-methylazetidine The title compound was obtained in the same manner as in Example 117 except that
Property: Yellow powder Melting point: 252-257 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.35 (s, 3H), 4.17 (brs, 2H), 4.30 (brs, 2H), 5.42 (brs, 2H), 6.96 (t, J = 8 Hz, 1H), 7 .36 (t, J = 10 Hz, 1H), 7.87 (d, J = 14 Hz, 1H), 8.43 (s, 1H)

Example 157
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6-fluoro-7- (3-methylaminoazetidin-1-yl) -1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-methylaminoazetidine was used. The title compound was obtained in the same manner as in Example 117 except for above.
Property: Pale yellow powder Melting point: 220-224 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.20 (s, 3H), 3.45 (brs, 1H), 4.12 (brs, 2H), 4.63 (brs, 2H), 5.42 (brs, 2H), 6.96 (t , J = 8 Hz, 1H), 7.36 (t, J = 10 Hz, 1H), 7.86 (d, J = 14 Hz, 1H), 8.43 (s, 1H)

Example 158
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6-fluoro-7- (3,5-dimethylpiperazino) -1,4-dihydro-4-oxoquinoline-3-carvone acid:
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 2,6-dimethylpiperazine was used. The title compound was obtained in the same manner as in Example 117 except for above.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
0.96 (d, J = 6 Hz, 6H), 2.80 (m, 2H), 2.91 (m, 2H), 3.08 (m, 2H), 5.43 (brs, 2H), 6 .97 (t, J = 8 Hz, 1H), 7.38 (t, J = 11 Hz, 1H), 8.07 (d, J = 12 Hz, 1H), 8.56 (s, 1H)

Example 159
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point:> 262 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.75-4.02 (m, 3H), 4.24 (brs, 2H), 5.25 (d, J = 7 Hz, 1H), 5.54 (brs, 2H), 6.98 (t, J = 8 Hz, 1H), 7.49 (t, J = 10 Hz, 1H), 8.48 (s, 1H)

Example 160
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3-aminopyrrolidine. The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point:> 237 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.01 (m, 1H), 2.21 (m, 1H), 3.34-4.97 (m, 5H), 5.46 (d, J = 7 Hz, 1H), 6.98 (t, J = 8 Hz, 1H), 7.50 (t, J = 10 Hz, 1H), 8.64 (s, 1H)

Example 161
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.75 (brs. 3H), 3.90 (brs, 2H), 4.01 (brs, 1H), 4.26 (brs, 2H), 5.55 (brs, 2H), 5.65 (d , J = 7 Hz, 1H), 6.99 (t, J = 8 Hz, 1H), 7.49 (t, J = 11 Hz, 1H), 8.59 (s, 1H)

[Example 162]
1- (3-Amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-fluoro-5-methyl-1,4-dihumanro-4-oxoquinoline -3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3-aminopyrrolidine The title compound was obtained in the same manner as in Example 60 except that it was used.
Property: Light brown powder Melting point:> 197 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.68 (m, 1H), 1.96 (m, 1H), 3.01-3.65 (m, 5H), 5.53 (brs, 2H), 5.81 (d, J = 7 Hz, 1H), 6.99 (t, J = 8 Hz, 1H), 7.49 (t, J = 11 Hz, 1H), 8.55 (s, 1H)

[Example 163]
5-Amino-1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6,8-difluoro-1,4-dihydro-4- Oxoquinoline-3-carboxylic acid:
5-amino-1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3- The title compound was obtained in the same manner as in Example 60 except that aminopyrrolidine was used.
Properties: Pale yellow powder Melting point:> 247 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.62 (m, 1H), 1.89 (m, 1H), 3.22 (m, 1H), 3.39-3.78 (m, 4H), 5.38 (brs, 2H), 7 .02 (t, J = 8 Hz, 1H), 7.23 (brs, 2H), 7.34 (t, J = 10 Hz, 1H), 8.23 (s, 1H)

Example 164
5-Amino-7- (3-aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6,8-difluoro-1,4-dihydro-4-oxoquinoline- 3-carboxylic acid:
5-amino-1- (3-amino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine di The title compound was obtained in the same manner as in Example 60 except that hydrochloride was used.
Properties: Yellow powder Melting point:> 237 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
4.04 (brs, 1H), 4.28 (brs, 2H), 4.48 (brs, 2H), 5.41 (brs, 2H), 7.05 (t, J = 8 Hz, 1H), 7 .30 (m, 1H), 8.25 (s, 1H)

Example 165
7- (3-Aminoazetidin-1-yl) -1- (3-amino-6-chloro-4-fluorophenyl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid :
Example 139 except that 1- (3-amino-6-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used The title compound was obtained.
Properties: Pale yellow powder Melting point:> 208 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.88-4.58 (br, 5H), 5.69 (d, J = 8 Hz, 1H), 5.92 (brs, 2H), 7.08 (d, J = 8 Hz, 1H), 7. 59 (d, J = 10 Hz, 1H), 7.93 (d, J = 13 Hz, 1H), 8.61 (s, 1H)

Example 166
Separate synthesis of ethyl 7-chloro-1- (2,4-difluoro-5-formylaminophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate:
400 mg of iron powder from 305 mg of ethyl 7-chloro-6-fluoro-1- (2,4-difluoro-5-nitrophenyl) -4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate The mixture was added to 1.5 ml of formic acid and stirred at 80 ° C. for 3 hours. Insoluble material was filtered off through celite, and concentrated under reduced pressure. The precipitate was dispersed in ethanol, collected by filtration, and washed successively with ethanol and diisopropyl ether to give 295 mg of the title compound as a pale yellow powder.

[Reference Example 10]
N- (t-butoxycarbonyl) -2,4-difluoro-m-phenylenediamine:
N- (t-butoxycarbonyl) -2,4-difluoro-5-nitroaniline was obtained as colorless crystals in the same manner as in Reference Example 8 except that t-butanol was used instead of ethanol.
3.8 g of this was added to 50 ml of methanol along with 360 mg of 10% palladium on carbon and hydrogenated at room temperature for 4 days. After the catalyst was filtered off, the solvent and the like were distilled off under reduced pressure. The precipitate was dispersed in diisopropyl ether and collected by filtration to obtain 3.2 g of the title compound as pale brown crystals.

[Reference Example 11]
Ethyl 8-chloro-1- (2-chloro-4-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 2-chloro-4-fluoroaniline was used.
Properties: Colorless powder Melting point: 208-212 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.16-7.23 (m, 1H), 7.34 (dd, J = 3 Hz, J = 8Hz.1H), 7.48 (dd, J = 5Hz, J = 9Hz, 1H), 8.27 (s, 1H), 8.35 (t, J = 9Hz, 1H)

[Reference Example 12]
Ethyl 8-chloro-6,7-difluoro-1- (4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 4-fluoroaniline was used.
Properties: Colorless powder Melting point: 226-231 ° C
¹ H NMR (CDCl ₃ ) δ;
1.39 (t, J = 7 Hz, 3H), 4.39 (q, J = 7 Hz, 2H), 7.20-7.24 (m, 2H), 7.34-7.35 (m, 2H) ), 8.34 (t, J = 9 Hz, 1H), 8.42 (s, 1H)

[Reference Example 13]
Ethyl 8-chloro-6,7-difluoro-1- (4-fluoro-2-methylphenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 2-methyl-4-fluoroaniline was used.
Property: Pale yellow powder Melting point: 180-182 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 2.10 (s, 3H), 4.40 (q, J = 7 Hz, 2H), 7.02-7.10 (m, 2H), 7. 22-7.36 (m, 1H), 8.31 (s.1H), 8.37 (t, J = 9 Hz, 1H)

[Reference Example 14]
Ethyl 1- (2-bromo-4-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 2-bromo-4-fluoroaniline was used.
Properties: Pale yellow powder Melting point: 183-188 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.18-7.32 (m, 1H), 7.48-7.55 (m, 2H) ), 8.27 (s, 1H), 8.36 (t, J = 9 Hz, 1H)

[Reference Example 15]
Ethyl 1- (2-methoxy-4-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 2-methoxy-4-fluoroaniline was used.
Properties: colorless powder Melting point: 240-246 ° C. (decomposition)
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 3.77 (s, 3H), 4.39 (q, J = 7 Hz, 2H), 6.72-6.89 (m, 2H), 7 .31 (dd, J = 6 Hz, J = 9 Hz, 1H), 8.30 (s, 1H), 8.34 (t, J = 10 Hz, 1H)

[Reference Example 16]
Ethyl 8-chloro-1- (4-chloro-2-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 4-chloro-2-fluoroaniline was used.
Properties: Colorless powder Melting point: 159-160 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.39 (q, J = 7 Hz, 2H), 7.31-7.47 (m, 2H), 8.32-8.40 (m, 2H) )

[Reference Example 17]
Ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Reference Example 6 except that 2,4,6-trifluoroaniline was used.
Properties: Pale yellow powder Melting point: 135-149 ° C (decomposition)
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 6.93 (t, J = 7 Hz, 1H), 8.25 (s, 1H), 8. 34 (t, J = 10Hz, 1H)

[Reference Example 18]
8-Chloro-6,7-difluoro-1- (2,4,6-trifluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
1.2 g of ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate is added to 5 ml of concentrated hydrochloric acid and 1 ml of acetic acid. And heated to reflux for 3 hours. After allowing to cool, the precipitated solid was collected by filtration and washed with ethanol and diethyl ether. 750 mg of the title compound was obtained.
Properties: Pale red powder Melting point:> 158 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
7.60-7.72 (m, 2H), 8.41 (t, J = 9 Hz, 1H), 9.01 (s, 1H)

Example 167
1- (3-Amino-4,6-difluorophenyl) -7- (trans-3-amino-2-methylazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4 -Oxo-quinoline-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, trans-3-amino-2-methyl The title compound was obtained in the same manner as in Example 117 except that azetidine was used.
Properties: Brown powder Melting point:> 211 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.38 (brs, 3H), 3.73-3.90 (m, 1H), 4.69-4.82 (m, 1H), 4.82-4.97 (m, 1H), 5. 32-5.48 (m, 1H), 5.49 (s, 1H), 6.70-7.59 (m, 2H), 7.94 (d, J = 14 Hz, 1H), 8.48 ( s, 1H)

Example 168
1- (3-Amino-4,6-difluorophenyl) -7- (4-methylpiperazin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, except that 4-methylpiperazine was used The title compound was obtained in the same manner as in Example 117.
Properties: Yellow powder Melting point: 198-205 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.54 (s, 3H), 2.81 (brs, 4H), 3.42 (brs, 4H), 7.01 (t, J = 7 Hz, 1H), 7.40 (t, J = 11 Hz, 1H), 8.15 (d, J = 12 Hz, 1H), 8.62 (s, 1H)

Example 169
1- (3-Amino-4,6-difluorophenyl) -7-[(3S, 4R) 3-amino-4-methylpyrrolidin-1-yl] -8-chloro-6-fluoro-1,4-dihydro -4-oxo-quinoline-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S, 4R) 3-amino- The title compound was obtained in the same manner as in Example 117 except that 4-methylpyrrolidine was used.
Property: Yellow powder Melting point: 170-179 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
0.95-1.11 (m, 3H), 1.88-2.09 (m, 1H), 2.60-3.72 (m, 5H), 5.38 (s, 1H), 5. 46 (s, 1H), 6.82-7.52 (m, 2H), 7.96 (d, J = 14 Hz, 1H), 8.40 (brs, 1H)

Example 170
1- (3-Amino-4,6-difluorophenyl) -7-[(3R) -3-aminopyrrolidin-1-yl] -8-chloro-6-fluoro-1,4-dihydro-4-oxo- Quinoline-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3R) -3-aminopyrrolidine The title compound was obtained in the same manner as in Example 117 except that it was used.
Properties: Brown powder Melting point: 169-179 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.52-1.80 (m, 1H), 1.84-2.07 (m, 1H), 2.71-3.82 (m, 5H), 5.40 (brs, 2H), 6. 93 (m, 1H), 7.36 (t, J = 10 Hz, 1H), 7.88 (d, J = 14 Hz, 1H), 8.40 (s, 1H)

[Example 171]
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3 -Carboxylic acid p-toluenesulfonate:
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3 -440 mg of carboxylic acid was added to 0.5 ml of N, N-dimethylformamide, 191 mg of p-toluenesulfonic acid monohydrate was added, and the mixture was stirred at room temperature. Diethyl ether was added to the reaction solution, and the supernatant was removed. Ethanol was added to the residue and the solid was collected by filtration and washed with diethyl ether to give 340 mg of the title compound.
Properties: Yellow powder Melting point: 211-220 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.28 (s, 3H), 4.04 (brs, 1H), 4.42 (brs, 2H), 4.76 (brs, 2H), 6.99 (t, J = 8 Hz, 1H), 7 .11 (d, J = 7 Hz, 2H), 7.37 (t, J = 11 Hz, 1H), 7.48 (d, J = 8 Hz, 2H), 7.94 (d, J = 15 Hz, 1H) , 8.33 (brs, 3H), 8.44 (s, 1H)

[Example 172]
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3 -Carboxylic acid methanesulfonate:
The title compound was obtained in the same manner as in Example 171 except that methanesulfonic acid was used.
Properties: Pale yellow powder Melting point: 180-190 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.35 (s, 3H), 4.04 (brs, 1H), 4.43 (brs, 2H), 4.75 (brs, 2H), 6.99 (t, J = 8 Hz, 1H), 7 .37 (t, J = 11 Hz, 1H), 7.95 (d, J = 14 Hz, 1H), 8.36 (brs, 3H), 8.48 (s, 1H)

[Example 173]
Ethyl 8-chloro-6,7-difluoro-1- (2-chloro-4-fluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The same procedure as in Example 97 except that ethyl 8-chloro-6,7-difluoro-1- (2-chloro-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used. To give the title compound.
Property: Brown powder Melting point: 197-201 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.25 (q, J = 7 Hz, 2H), 8.23-8.32 (m, 2H), 8.55 (s, 1H), 8. 94 (d, J = 7Hz, 1H)

Example 174
1- (3-Amino-6-chloro-4-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
1.5 g of ethyl 8-chloro-6,7-difluoro-1- (2-chloro-4-fluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate, 2 g of iron The mixture was added to 5 ml of formic acid and stirred at 60 ° C. for 2 hours. The insoluble material was filtered off through celite and washed with formic acid and chloroform. The filtrate was concentrated under reduced pressure, ethanol was added to the residue, and the solid was collected by filtration and washed with diethyl ether. To this solid was added 4 ml of concentrated hydrochloric acid and 4 ml of acetic acid, and the mixture was heated to reflux for 1 hour. After allowing to cool, the precipitate was collected by filtration and washed with ethanol and diethyl ether to obtain 970 mg of the title compound.
Property: Pale yellow powder Melting point: 237-242 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.12 (d, J = 8 Hz, 1H), 7.50 (d, J = 12 Hz, 1H), 8.41 (t, J = 9 Hz, 1H), 8.60 (s, 1H)

Example 175
7- (3-Aminoazetidin-1-yl) -1- (3-amino-6-chloro-4-fluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline -3-carboxylic acid:
Example 117 except that 8-chloro-6,7-difluoro-1- (3-amino-6-chloro-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used To give the title compound.
Properties: colorless powder Melting point:> 265 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.70 (brs, 1H), 4.06 (brs, 2H), 4.67 (brs, 2H), 5.76 (s, 2H), 6.99 (d, J = 8 Hz, 1H), 7 .46 (d, J = 11 Hz, 1H), 7.88 (d, J = 14 Hz, 1H), 8.48 (s, 1H)

Example 176
1- (3-Amino-6-chloro-4-fluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -8-chloro-6-fluoro-1,4-dihydro-4- Oxo-quinoline-3-carboxylic acid:
8-chloro-6,7-difluoro-1- (3-amino-6-chloro-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid, (3S) -3-amino The title compound was obtained in the same manner as in Example 117 except that pyrrolidine was used.
Properties: Pale yellow powder Melting point:> 195 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.52-1.74 (m, 1H), 1.91-2.15 (m, 1H), 2.71-3.80 (m, 5H), 5.75 (brs, 2H), 6. 99 (t, J = 8 Hz, 1H), 7.46 (t, J = 11 Hz, 1H), 7.92 (d, J = 14 Hz, 1H), 8.35 (s, 1H)

Example 177
Ethyl 8-chloro-6,7-difluoro-1- (4-fluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was prepared in the same manner as in Example 97 except that ethyl 8-chloro-6,7-difluoro-1- (4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used. Obtained.
Properties: Colorless powder Melting point: 249-256 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.26 (t, J = 7 Hz, 3H), 4.23 (q, J = 7 Hz, 2H), 7.84 (t, J = 10 Hz, 1H), 8.14-8.19 (m, 1H) ), 8.23 (t, J = 9 Hz, 1H), 8.50 (s, 1H), 8.65-8.68 (m, 1H)

Example 178
8-Chloro-6,7-difluoro-1- (3-amino-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 174 except that ethyl 8-chloro-5,6,7-trifluoro-1- (4-fluoro-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used To give the title compound.
Properties: Colorless powder Melting point: 238-243 ° C
¹ H NMR (d ₆ -DMSO) δ;
6.74-6.89 (m, 1H), 6.95-7.07 (m, 1H), 7.21 (t, J = 8 Hz, 1H), 8.40 (t, J = 9 Hz, 1H) ), 8.56 (s, 1H)

Example 179
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4-fluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carvone acid:
The same procedure as in Example 117 except that 8-chloro-6,7-difluoro-1- (3-amino-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used. The title compound was obtained.
Properties: Yellow powder Melting point: 236-246 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.77 (brs, 1H), 4.12 (brs, 2H), 4.66 (brs, 2H), 5.58 (s, 2H), 6.60-6.72 (m, 1H), 6 .87 (d, J = 8 Hz, 1H), 7.16 (t, J = 10 Hz, 1H), 7.87 (d, J = 14 Hz, 1H), 8.39 (s, 1H)

Example 180
Ethyl 8-chloro-6,7-difluoro-1- (4-fluoro-2-methyl-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The same procedure as in Example 97 except that ethyl 8-chloro-6,7-difluoro-1- (2-methyl-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used. To give the title compound.
Property: Red powder Melting point: 187-191 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 2.25 (s, 3H), 4.20 (q, J = 7 Hz, 2H), 7.36 (d, J = 11 Hz, 1H), 8. 11 (d, J = 7 Hz, 1H) 8.26 (s, 1H), 8.38 (t, J = 9 Hz, 1H)

[Example 181]
8-chloro-6,7-difluoro-1- (3-amino-4-fluoro-6-methylphenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example except that ethyl 8-chloro-6,7-difluoro-1- (4-fluoro-2-methyl-5-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used The title compound was obtained in the same manner as 174.
Properties: Colorless powder Melting point: 225-230 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.89 (s, 3H), 7.00 (d, J = 8 Hz, 1H), 7.16 (d, J = 12 Hz, 1H), 8.42 (t, J = 9 Hz, 1H), 8. 51 (s, 1H)

[Example 182]
1- (3-Amino-4-fluoro-6-methylphenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline -3-carboxylic acid:
Example 117 except that 8-chloro-6,7-difluoro-1- (3-amino-4-fluoro-6-methylphenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used To give the title compound.
Properties: Brown powder Melting point:> 251 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.88 (s, 3H), 3.71 (brs, 1H), 4.06 (brs, 2H), 4.65 (brs, 2H), 5.38 (s, 2H), 6.79 (d , J = 7 Hz, 1H), 7.06 (d, J = 11 Hz, 1H), 7.91 (d, J = 13 Hz, 1H), 8.29 (s, 1H)

[Example 183]
Ethyl 1- (2-bromo-4-fluoro-5-nitrophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The same procedure as in Example 97 except that ethyl 1- (2-bromo-4-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used. To give the title compound.
Property: Brown powder Melting point: 205-214 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.27 (t, J = 7 Hz, 3H), 4.25 (q, J = 7 Hz, 2H), 8.27 (t, J = 9 Hz, 1H), 8.41 (d, J = 11 Hz, 1H) ), 8.53 (s, 1H), 8.91 (d, J = 8 Hz, 1H)

Example 184
8-Chloro-6,7-difluoro-1- (3-amino-6-bromo-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 1 except that ethyl 1- (2-bromo-4-fluoro-5-nitrophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used The title compound was obtained in the same manner as 117.
Property: Pale yellow powder Melting point: 231-239 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.14 (d, J = 9 Hz, 1H), 7.58 (d, J = 11 Hz, 1H), 8.43 (t, J = 9 Hz, 1H), 8.58 (s, 1H)

Example 185
7- (3-Aminoazetidin-1-yl) -1- (3-amino-6-bromo-4-fluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline -3-carboxylic acid:
Example 117 except that 8-chloro-6,7-difluoro-1- (3-amino-6-bromo-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used To give the title compound.
Properties: Pale yellow powder Melting point:> 200 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.89 (brs, 1H), 4.27 (brs, 2H), 4.71 (brs, 2H), 5.81 (s, 2H), 7.03 (d, J = 8 Hz, 1H), 7 .55 (d, J = 11 Hz, 1H), 7.93 (d, J = 14 Hz, 1H), 8.33 (s, 1H)

Example 186
Ethyl 1- (2-methoxy-4-fluoro-5-nitrophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The same procedure as in Example 97 except that ethyl 1- (2-methoxy-4-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used. To give the title compound.
Property: Pale yellow powder Melting point: 220-225 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 3.92 (s, 3H), 4.40 (q, J = 7 Hz, 2H), 6.94 (d, J = 12 Hz, 1H), 8. 21-8.30 (m, 1H), 8.26 (s, 1H), 8.34 (t, J = 9 Hz, 1H)

Example 187
8-chloro-6,7-difluoro-1- (3-amino-6-methoxy-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 1 except that ethyl 1- (2-methoxy-4-fluoro-5-nitrophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used The title compound was obtained in the same manner as 174.
Properties: Pale yellow powder Melting point: 143-151 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.70 (s, 3H), 7.19-7.37 (m, 2H), 8.40 (t, J = 9Hz, 1H), 8.56 (s, 1H)

Example 188
1- (3-Amino-6-methoxy-4-fluorophenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo-quinoline -3-carboxylic acid:
Example 117 except that 8-chloro-6,7-difluoro-1- (3-amino-6-methoxy-4-fluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used To give the title compound.
Properties: Pale yellow powder Melting point:> 244 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.68 (brs, 4H), 4.05 (brs, 2H), 4.65 (brs, 2H), 5.01 (s, 2H), 6.87 (brs, 1H), 7.09 (d , J = 12 Hz, 1H), 7.86 (d, J = 14 Hz, 1H), 8.29 (s, 1H)

Example 189
Ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-5-nitro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Example 102 except that ethyl 3-chloro-2,4,5-trifluoro-6-nitrobenzoyl acetate was used.
Properties: Brown powder Melting point: 233-241 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.38 (t, J = 7 Hz, 3H), 4.38 (q, J = 7 Hz, 2H), 5.21 (s, 2H), 7.01-7.15 (m, 2H), 7. 40 (s, 5H), 8.32-8.40 (m, 1H), 8.36 (s, 1H)

Example 190
5-Amino-1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Use ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-5-nitro-1,4-dihydro-4-oxoquinoline-3-carboxylate In the same manner as in Example 174, the title compound was obtained.
Property: Yellow powder Melting point:> 270 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.02 (t, J = 8 Hz, 1H), 7.39 (t.J = 10 Hz, 1H), 8.46 (s, 1H)

Example 191
5-Amino-1- (3-amino-4,6-difluorophenyl) -7- (3-aminoazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxo -Quinoline-3-carboxylic acid:
Implemented except using 5-amino-1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid The title compound was obtained in the same manner as in Example 117.
Properties: Brown powder Melting point:> 229 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.98 (brs, 1H), 4.38 (brs, 2H), 4.67 (brs, 2H), 5.39 (s, 2H), 6.90 (t, J = 8 Hz, 1H), 7 .34 (t, J = 11 Hz, 1H), 8.29 (s, 1H)

Example 192
Ethyl 1- (3-benzyloxycarbonylamino-4,5,6-trifluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was prepared in the same manner as in Example 102 except that ethyl 3-chloro-2,4,5-trifluorobenzoyl acetate and N-benzyloxycarbonyl-4,5,6-trifluoro-m-phenylenediamine were used. Obtained.
¹ H NMR (d ₆ -DMSO) δ;
1.42 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 5.21 (s, 2H), 7.05 (brs, 1H), 7.39 (s, 5H), 8.19 (brs, 1H), 8.31 (s, 1H), 8.34 (t, J = 8 Hz, 1H)

Example 193
1- (3-Amino-4,5,6-trifluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Ethyl 1- (3-benzyloxycarbonylamino-4,5,6-trifluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used. The title compound was obtained in the same manner as in Example 103 except for the above.
Property: Colorless powder Melting point: 232-238 ° C
¹ H NMR (d ₆ -DMSO) δ;
6.88 (dd, J = 4 Hz, J = 9 Hz, 1H), 8.40 (t, J = 9 Hz, 1H), 8.79 (s, 1H)

Example 194
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,5,6-trifluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
Examples except that 1- (3-amino-4,5,6-trifluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used The title compound was obtained in the same manner as 117.
Properties: Pale yellow powder Melting point:> 224 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.73 (brs, 1H), 4.08 (brs, 2H), 4.68 (brs, 2H), 5.78 (s, 2H), 6.78 (t, J = 6 Hz, 1H), 7 .87 (d, J = 14 Hz, 1H), 8.55 (s, 1H)

Example 195
Ethyl 1- (3-tert-butyloxycarbonylamino-4,6-difluorophenyl) -8-bromo-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
Ethyl 3-bromo-2,4,5-trifluorobenzoyl acetate and Example 102 except that N- (t-butoxycarbonyl) -2,4-difluoro-m-phenylenediamine of Reference Example 10 was used. To give the title compound.
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 1.54 (s, 9H), 4.40 (q, J = 7 Hz, 2H), 6.81 (brs, 1H), 7.07 (t, J = 10 Hz, 1H), 8.25-8.48 (m, 2H), 8.38 (s, 1H)

Example 196
1- (3-Amino-4,6-difluorophenyl) -8-bromo-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Besides using ethyl 1- (3-tert-butyloxycarbonylamino-4,6-difluorophenyl) -8-bromo-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate Gave the title compound as in Example 103.
Property: Yellow powder Melting point: 228-232 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.05 (t, J = 8 Hz, 1H), 7.43 (t, J = 11 Hz, 1H), 8.43 (t, J = 9 Hz, 1H), 8.69 (s, 1H)

Example 197
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -8-bromo-6-fluoro-1,4-dihydro-4-oxo-quinoline-3 -Carboxylic acid:
Similar to Example 117 except that 1- (3-amino-4,6-difluorophenyl) -8-bromo-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used. To give the title compound.
Properties: Pale yellow powder Melting point:> 206 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.76 (brs, 1H), 4.07 (brs, 2H), 4.68 (brs, 2H), 5.41 (s, 2H), 6.92 (t, J = 8 Hz, 1H), 7 .38 (t, J = 11 Hz, 1H), 7.90 (d, J = 14 Hz, 1H), 8.46 (s, 1H)

Example 198
Ethyl 1- [3- (Nt-butoxycarbonyl-N-methylamino) -4,6-difluorophenyl] -8-chloro-6,7-difluoro-4-oxo-1,4-dihydro-quinoline- 3-carboxylate:
3-Ethoxy-2- (3′-chloro-2 ′, 4 ′, 5′-trifluorobenzoyl) prepared from 1.40 g of 3-chloro-2,4,5-trifluorobenzoylacetic acid ethyl ester by a conventional method ) N- (t-Butoxycarbonyl) -4,6-difluoro-m-phenylenediamine was added to 10 ml of a chloroform solution in which acrylic acid ethyl ester had been dissolved while following the end point of the reaction by TLC. The solution was concentrated under reduced pressure. To this, 1.4 g of anhydrous potassium carbonate and 6 ml of N, N-dimethylformamide were added and stirred at 90 ° C. for 10 minutes. After allowing to cool, 1.4 g of anhydrous potassium carbonate and 5.0 g of methyl iodide were further added and stirred at 60 ° C. for 2 hours. 50 ml of chloroform and 500 ml of distilled water were added for liquid separation, and the chloroform layer was washed twice with 500 ml of distilled water, then dried over anhydrous magnesium sulfate, concentrated under reduced pressure, and 3 ml of ethanol was added and left standing. . The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 1.38 g of the title compound.
Properties: Pale yellow powder Melting point: 192-194 ° C
¹ H NMR (CDCl ₃ ) δ;
1.43 (t, J = 7 Hz, 3H), 1.44 (s, 9H), 3.22 (s, 3H), 4.41 (q, J = 7 Hz, 2H), 7.10 (t, J = 9 Hz, 1H), 7.38 (t, J = 8 Hz, 1H), 8.34 (dd, J = 8 Hz, 10 Hz, 1H), 8.58 (s, 1H)

Example 199
1- (3-Methylamino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid:
Ethyl 1- [3- (Nt-butoxycarbonyl-N-methylamino) -4,6-difluorophenyl] -8-chloro-6,7-difluoro-4-oxo-1,4-dihydro-quinoline- 1.26 g of 3-carboxylate was added to 4 ml of a mixed solution of 4N hydrochloric acid and acetic acid (1; 1, v / v), and the mixture was refluxed with stirring for 1.5 hours. 5 ml of distilled water was added and the mixture was allowed to cool. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 890 mg of the title compound.
Properties: Pale yellow powder Melting point: 217-220 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.67 (d, J = 5 Hz, 3H), 5.95 (brs, 1H), 7.06 (t, J = 8 Hz, 1H), 7.45 (dd, J = 10 Hz, 12 Hz, 1H), 8.41 (dd, J = 9 Hz, 10 Hz, 1H), 8.72 (S, 1H)

Example 200
7- (3-Aminoazetidinyl) -1- (3-methylamino-4,6-difluorophenyl) -8-chloro-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carvone acid:
1- (3-Methylamino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid 150 mg, 3-aminoazetidine di 110 mg of hydrochloride and 250 mg of N-methylpyrrolidine were added to 650 mg of N, N-dimethylformamide and stirred at 90 ° C. for 1 hour. 0.5 ml of ethanol was added and the mixture was allowed to cool. The precipitate was collected by filtration and washed with ethanol and diisopropyl ether in this order to obtain 130 mg of the title compound.
Properties: Colorless powder Melting point: 209-212 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.68 (d, J = 5 Hz, 3H), 3.69 (m, 1H), 4.02 (m, 2H), 4.65 (m, 2H), 5.89 (brs, 1H), 6 .96 (t, J = 8 Hz, 1H), 7.40 (t, J = 10 Hz, 1H), 7.88 (d, J = 14 Hz, 1H), 8.48 (S, 1H)

Example 201
Ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-8-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylate:
To 4.1 g of ethyl 2,4,5-trifluoro-3-methoxybenzoyl acetate, 8.6 ml of acetic anhydride and 3.2 ml of triethyl orthoformate were added and heated under reflux for 2 hours. The solvent was distilled off, and toluene was added to the residue. Azeotropically. To the residue was added 10 ml of chloroform, and at 0 ° C., a solution of 1.81 g of N-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine in 10 ml of chloroform was added dropwise and stirred at room temperature for 3 days. The solvent of the reaction solution was distilled off, and the residue was purified by silica gel column chromatography (elution solvent; ethyl acetate: hexane = 1: 8). Of the oily product 2.4 g, 580 mg of N, N-dimethylformamide 4 ml To the solution, 138 mg of potassium carbonate was added and stirred at 100 ° C. for 25 minutes. The reaction solution is poured into ice water, ice water and ethyl acetate are added to the reaction solution, the organic layer is separated, washed with water, dried over magnesium sulfate, the solvent is distilled off, and the residue is subjected to silica gel column chromatography. (Elution solvent; chloroform: methanol = 10: 1), the obtained solid was collected by filtration and washed with diethyl ether to obtain 250 mg of the title compound.
Properties: Pale yellow powder Melting point: 159-162 ° C
¹ H NMR (CDCl ₃ ) δ;
1.39 (t, J = 7 Hz, 3H), 3.57 (s, 3H), 4.37 (q, J = 7 Hz, 2H), 6.84 (t, J = 8 Hz, 1H), 7. 00 (t, J = 9 Hz, 1H), 8.08 (t, J = 9 Hz, 1H), 8.26 (s, 1H)

Example 202
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-8-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 103 except that ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-8-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylate was used In the same manner, the title compound was obtained.
Properties: Colorless powder Melting point:> 277 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.12 (s, 3H), 6.71 (t, J = 9 Hz, 1H), 7.00 (t, J = 10 Hz, 1H), 7.73 (t, J = 9 Hz, 1H), 8. 20 (s, 1H)

Example 203
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-8-methoxy-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
170 mg of 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-8-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was suspended in 4 ml of diethyl ether, Under ice-cooling, 9 ml of boron trifluoride diethyl ether complex was added and stirred at room temperature for 1.5 hours. Diethyl ether was added to the reaction solution, and the precipitated solid was collected by filtration and washed with ethanol and diethyl ether in this order to obtain a pale yellow powder.
A solution of 70 mg of 3-aminoazetidine dihydrochloride and 0.17 ml of triethylamine in 1 ml of dimethyl sulfoxide was stirred at 70 ° C., 100 mg of the above compound was added, and the mixture was stirred at the same temperature for 2 hours. Diethyl ether was added to the reaction solution, followed by decantation. The residue was refluxed overnight with 5 ml of 80% methanol and 5 ml of triethylamine. Ethanol was added to the reaction solution and the solid was collected by filtration to obtain 34 mg of the title compound as a tan powder.
Property: Yellow powder Melting point:> 290 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.11 (s, 3H), 3.74-3.89 (m, 2H), 3.90-4.02 (m, 1H), 4.38-4.48 (m, 2H), 5. 36 (brs, 2H), 7.14 (t, J = 9 Hz, 1H), 7.30 (t, J = 10 Hz, 1H), 7.76 (d, J = 12 Hz, 1H), 8.39 ( s, 1H)

Example 204
8-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
The same as Example 9 except that 8-chloro-6,7-difluoro-1- (2,4,6-trifluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used. To give the title compound.
Properties: Pale yellow powder Melting point: 157-159 ° C
¹ H NMR (d ₆ -DMSO) δ;
8.16 (t, J = 11 Hz, 1H), 8.40 (t, J = 9 Hz, 1H), 9.06 (s, 1H)

Example 205
Ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
2-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylic acid (830 mg) in 2 ml of thionyl chloride And stirred at 80 ° C. overnight. After slowly adding dropwise 4 ml of ethanol to the reaction solution under ice cooling, the solvent of the reaction solution was distilled off and the precipitated solid was collected by filtration to obtain 310 mg of the title compound.
Properties: Pale yellow powder Melting point: 167-169 ° C
¹ H NMR (CDCl ₃ ) δ;
1.41 (t, J = 7 Hz, 3H), 4.41 (q, J = 7 Hz, 2H), 7.19 (t, J = 9 Hz, 1H), 8.22 (s, 1H), 8. 35 (t, J = 9Hz, 1H)

Example 206
Ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
Except for using ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-nitrophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate The title compound was obtained in the same manner as in Example 166.
Properties: Light brown powder Melting point: 197-199 ° C

Example 207
1- (3-Amino-2,4,6-trifluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Other than using ethyl 8-chloro-6,7-difluoro-1- (2,4,6-trifluoro-3-formylaminophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate The title compound was obtained in the same manner as in Example 19.
Properties: Pale yellow powder
¹ H NMR (d ₆ -DMSO) δ;
5.57 (brs, 2H), 7.42 (t, J = 11 Hz, 1H), 8.40 (t, J = 9 Hz, 1H), 8.91 (s, 1H)

Example 208
7- (3-Aminoazetidin-1-yl) -1- (3-amino-2,4,6-trifluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
Examples except that 1- (3-amino-2,4,6-trifluorophenyl) -8-chloro-6.7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used The title compound was obtained in the same manner as 117.
Properties: Light brown powder Melting point:> 290 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.77-3.86 (m, 1H), 4.15-4.27 (m, 2H), 4.64-4.75 (m, 1H), 5.52 (brs, 2H), 7. 38 (t, J = 10 Hz, 1H), 7.91 (d, J = 13 Hz, 1H), 8.66 (s, 1H)

Example 209
Ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -6-chloro-7,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Example 102 except that ethyl 5-chloro-2,3,4-trifluorobenzoyl acetate and 3-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine were used.
Properties: Pale yellow powder Melting point: 204-205 ° C
¹ H NMR (CDCl ₃ ) δ;
1.39 (t, J = 7 Hz, 3H), 4.38 (q, J-7 Hz, 2H), 7.02 (brs, 1H), 7.11 (t, J = 10 Hz, 1H), 7. 39 (s, 5H), 8.28 (s, 1H), 8.35-8.50 (m, 2H)

Example 210
1- (3-Amino-4,6-difluorophenyl) -6-chloro-7,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Implemented except using ethyl 1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -6-chloro-7,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate The title compound was obtained in the same manner as in Example 103.
Properties: colorless powder Melting point: 276-278 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.15 (t, J = 9 Hz, 1H), 7.45 (t, J = 11 Hz, 1H), 8.38 (d, J = 8 Hz, 1H), 8.73 (s, 1H)

Example 211
1- (3-amino-4,6-difluorophenyl) -7-[(3S) -3-aminopyrrolidin-1-yl] -6-chloro-8-fluoro-1,4-dihydro-4-oxoquinoline -3-carboxylic acid:
Similar to Example 60 except that 1- (3-amino-4,6-difluorophenyl) -6-chloro-7,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was used. To give the title compound.
Properties: Pale yellow powder Melting point:> 240 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
1.51-1.68 (m, 1H), 1.88-2.04 (m, 1H), 5.44 (brs, 2H), 7.09 (t, J = 8 Hz, 1H), 7. 39 (t, J = 11 Hz, 1H), 8.05 (s, 1H), 8.48 (s, 1H)

Example 212
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-chloro-8-fluoro-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -6-chloro-7,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that it was used.
Properties: Pale yellow powder Melting point: 190-193 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.65-3.77 (m, 1H), 3.97-4.10 (m, 2H), 4.52-4.68 (m, 2H), 5.44 (brs, 2H), 7. 07 (t, J = 8 Hz, 1H), 7.38 (t, J = 11 Hz, 1H), 7.96 (s, 1H), 8.45 (s, 1H)

[Example 213]
Ethyl 8-chloro-1- (4-chloro-2-fluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The same as Example 97 except that ethyl 8-chloro-1- (4-chloro-2-fluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used. To give the title compound.
Properties: Colorless powder Melting point: 206-208 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.57 (d, J = 9 Hz, 1H), 8.16 (d, J = 7 Hz, 1H) ), 8.30 (s, 1H), 8.34 (t, J = 10 Hz, 1H)

Example 214
Ethyl 8-chloro-1- (4-chloro-6-fluoro-3-formylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
Example except that ethyl 8-chloro-1- (4-chloro-2-fluoro-5-nitrophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used Similar to 166, the title compound was obtained.
Property: Light brown powder Melting point: 241-244 ° C

[Example 215]
1- (3-Amino-4-chloro-6-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Implemented except using ethyl 8-chloro-1- (4-chloro-6-fluoro-3-formylaminophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate The title compound was obtained in the same manner as in Example 19.
Property: Pale yellow powder Melting point: 255-258 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.08 (d, J = 7 Hz, 1H), 7.55 (d, J = 10 Hz, 1H), 8.40 (t, J = 9 Hz, 1H), 8.70 (s, 1H)

[Example 216]
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4-chloro-6-fluorophenyl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline- 3-carboxylic acid:
1- (3-Amino-4-chloro-6-fluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 60 except that the salt was used.
Properties: Pale yellow powder Melting point:> 290 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.66-3.79 (m, 1H), 4.00-4.15 (m, 2H), 4.60-4.74 (m, 2H), 5.61 (brs, 2H), 7. 00 (d, J = 10 Hz, 1H), 7.50 (d, J = 10 Hz, 1H), 7.87 (d, J = 14 Hz, 1H)

[Example 217]
Ethyl 1- (3-t-butoxycarbonylamino-4-fluoro-2-methoxyphenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Example 102 except that ethyl 3-chloro-2,4,5-trifluorobenzoyl acetate and 3-t-butoxycarbonylamino-4-fluoro-2-methoxyaniline were used.
Properties: Pale yellow powder Melting point: 184-189 ° C
¹ H NMR (CDCl ₃ ) δ;
1.39 (t, J = 7 Hz, 3H), 3.64 (s, 3H), 4.39 (q, J = 7 Hz, 2H), 6.05 (brs, 1H), 7.06 (t, J = 8 Hz, 1H), 7.21-7.29 (m, 1H), 8.31-8.40 (m, 2H)

Example 218
1- (3-Amino-4-fluoro-2-methoxyphenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 1 except that ethyl 1- (3-t-butoxycarbonylamino-4-fluoro-2-methoxyphenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate was used The title compound was obtained in the same manner as 103.
Properties: Pale yellow powder Melting point: 203-215 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.43 (s, 3H). 6.78-6.90 (m, 1H), 7.08 (t, J = 8 Hz, 1H), 8.42 (t, J = 7 Hz, 1H), 8.61 (s.1H)

[Example 219]
7- (3-Aminoazetidin-1-yl) -1- (3-amino-4-fluoro-2-methoxyphenyl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid :
1- (3-amino-4-fluoro-2-methoxyphenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 3-aminoazetidine dihydrochloride, N- The title compound was obtained in the same manner as in Example 117 except that methylpyrrolidine was used.
Properties: Colorless powder Melting point:> 179 ° C (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
3.42 (s, 3H), 3.96-4.13 (m, 2H), 4.55-4.72 (m, 2H), 5.40 (brs, 2H), 6.71-6. 83 (m, 1H), 7.03 (t, J = 7 Hz, 1H), 7.88 (d, J = 14 Hz, 1H), 8.39 (s, 1H)

Example 220
Ethyl 6,7,8-trichloro-1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Example 102 except that ethyl 2,3,4,5-tetrachlorobenzoyl acetate and 3-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine were used.
Properties: Pale yellow powder Melting point: 128-129 ° C
¹ H NMR (CDCl ₃ ) δ;
1.40 (t, J = 7 Hz, 3H), 4.40 (q, J = 7 Hz, 2H), 7.03-7.14 (m, 2H), 7.40 (s, 5H), 8. 27 (s, 1H), 8.60 (s, 1H)

[Example 221]
1- (3-Amino-4,6-difluorophenyl) -6,7,8-trichloro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 103, except that ethyl 6,7,8-trichloro-1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -1,4-dihydro-4-oxoquinoline-3-carboxylate was used To give the title compound.
Properties: Colorless powder Melting point: 251-252 ° C
¹ H NMR (d ₆ -DMSO) δ;
7.01 (t, J = 8 Hz, 1H), 7.41 (t, J = 10 Hz, 1H), 8.52 (s, 1H), 8.66 (s, 1H)

Example 222
Ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylate:
The title compound was obtained in the same manner as in Example 201 except that ethyl 2,4,5-trifluoro-3-methylbenzoyl acetate was used.
Property: Pale yellow powder Melting point: 221-223 ° C
¹ H NMR (CDCl ₃ ) δ;
1.38 (t, J = 7 Hz, 3H), 1.85 (s, 3H), 3.98 (brs, 2H), 4.37 (q, J = 7 Hz, 2H), 6.81 (t, J = 8 Hz, 1H), 7.02 (t, J = 10 Hz, 1H), 8.19 (t, J = 10 Hz, 1H), 8.32 (s, 1H)

[Example 223]
1- (3-Amino-4,6-difluorophenyl) -6,7-difluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
Example 103 except that ethyl 1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylate was used In the same manner, the title compound was obtained.
Properties: Pale yellow powder Melting point: 264-267 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.86 (d, J = 3 Hz, 1H), 7.12 (t, J = 8 Hz, 1H), 7, 47 (t, J = 11 Hz, 1H), 8.25 (t, J = 9 Hz, 1H) ), 8.69 (s, 1H)

[Example 224]
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminomethyl-3-hydroxyazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4- Oxoquinoline-3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-aminomethyl-3-hydroxyazeti The title compound was obtained in the same manner as in Example 117 except that gin dihydrochloride and triethylamine were used.
Properties: Pale yellow powder melting point:> 209 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.83 (brs, 2H), 4.21 (brs, 2H), 4.52 (brs, 2H), 5.42 (brs, 2H), 6.90-7.10 (m, 1H), 7 .36 (t, 1H), 7.85 (d, J = 14.5 Hz, 1H), 8.39 (s, 1H)

Example 225
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminomethylazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-aminomethylazetidine dihydrochloride The title compound was obtained in the same manner as in Example 117 except that triethylamine was used.
Properties: Pale yellow powder melting point:> 217 ° C. (decomposition)
¹ HNMR (d ₆ -DMSO + d-TFA) δ;
2.89 (brs, 1H), 3.11 (brs, 2H), 4.29 (brs, 2H), 4.58 (brs, 2H), 6.90-7.05 (m, 1H), 7 .36 (t, 1H), 7.90 (d, J = 13 Hz, 1H), 8.46 (s, 1H)

[Example 226]
1- (3-Amino-4,6-difluorophenyl) -8-chloro-7- (3-dimethylaminoazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -8-chloro-6.7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-dimethylaminoazetidine dihydrochloride The title compound was obtained in the same manner as in Example 117 except that triethylamine was used.
Properties; Yellow powder melting point:> 256 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
2.07 (s, 6H), 3.03 (brs, 1H), 4.23 (brs, 2H), 4.54 (brs, 2H), 5.41 (brs, 2H), 6.98 (t , J = 8 Hz, 1H), 7.37 (t, J = 11 Hz, 1H), 7.87 (d, J = 13 Hz, 1H), 8.45 (s, 1H)

[Example 227]
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminomethylpyrrolidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3- carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-aminomethylpyrrolidine dihydrochloride The title compound was obtained in the same manner as in Example 117 except that triethylamine was used.
Properties; Yellow powder melting point: 183.0-185.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.50-1.80 (br, 1H), 1.85-2.10 (br, 1H), 2.35-2.60 (m, 1H), 2.80 (brs, 2H), 3. 00-3.65 (m, 4H), 5.45 (brs, 2H), 6.90-7.05 (m, 1H), 7.35 (t, 1H), 7.96 (d, J = 12Hz, 1H), 8.55 (s, 1H)

Example 228
1- (3-Amino-4,6-difluorophenyl) -8-chloro-7- (3-hydroxycarbonylazetidin-1-yl) -6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and azetidine-3-carboxylic acid hydrochloride The title compound was obtained in the same manner as in Example 117 except that triethylamine was used.
Properties: Light yellow powder Melting point: 227.0-231.0 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.25-3.60 (m, 1H), 4.50 (brs, 2H), 4.66 (brs, 2H), 5.42 (brs, 2H), 6.96 (t, J = 8 Hz, 1H), 7.37 (t, J = 10 Hz, 1H), 7.89 (d, J = 13.7 Hz, 1H), 8.46 (s, 1H)

Example 229
7- (3-acetylaminoazetidin-1-yl) -1- (3-amino-4,6-difluorophenyl) -6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine 3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-acetylaminoazetidine The title compound was obtained in the same manner as in Example 117 except that hydrochloride and triethylamine were used.
Properties: Light brown powder Melting point: 289.0-295.0 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.81 (s, 3H), 3.60-4.90 (m, 5H), 5.35 (brs, 2H), 6.94 (t, 1H), 7.35 (t, J = 10 Hz, 1H), 8.06 (d, J = 10 Hz, 1H), 8.54 (brs, 1H), 8.69 (s, 1H)

Example 230
1- (3-Amino-4,6-difluorophenyl) -7-((1R, 4R) -2,5-diazabicyclo [2.2.1] heptan-2-yl) -6-fluoro-1,4 -Dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid:
1- (3-amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and (1R, 4R)- The title compound was obtained in the same manner as in Example 117 except that 2,5-diazabicyclo [2.2.1] heptane dihydrochloride and triethylamine were used.
Properties: Pale yellow powder melting point:> 284 ° C. (decomposition)
¹ HNMR (d ₆ -DMSO + d-TFA) δ;
1.90 (d, J = 11 Hz, 1H), 2.11 (d, J = 11 Hz, 1H), 3.15-3.90 (m, 5H), 4.45 (s, 1H), 5. 20-6.10 (br, 2H), 6.98 (t, 1H), 7.36 (t, J = 10 Hz, 1H), 8.18 (d, J = 12 Hz, 1H), 8.76 ( s, 1H), 9.15-9.30 (br, 2H)

[Example 231]
1- (3-Amino-4,6-difluorophenyl) -8-chloro-7- (3,7-diazabicyclo [3.3.0] octane-3-yl) -6-fluoro-1,4-dihydro -4-oxoquinoline-3-carboxylic acid hydrochloride:
1- (4-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid 100 mg and 3-t-butoxycarbonyl-3 , 7-diazabicyclo [3.3.0] octane 104 mg and triethylamine 150 mg were dissolved in 3 ml of acetonitrile and stirred at 80 ° C. for 3 hours. The solvent was distilled off under reduced pressure. Extracted with 30 ml of chloroform. The organic layer was washed with 20 ml of 3% aqueous citric acid solution. Distilled off after drying. This was dissolved in 20 ml of dichloromethane. 4N hydrochloric acid / dioxane (5 ml) was added, and the mixture was stirred at room temperature for 2 hours. The solvent was distilled off under reduced pressure. The residue was solidified with isopropyl ether and collected by filtration. 120 mg of the title compound was obtained as a pale yellow powder.
Properties: Pale yellow powder melting point: 199.5-204.0 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.85-3.10 (m, 4H), 3.30-3.70 (m, 6H), 7.02 (t, J = 8 Hz, 1H), 7.41 (t, J = 10 Hz, 1H) ), 8.08 (d, J = 12.5 Hz, 1H), 8.59 (s, 1H), 9.13 (brs, 1H), 9.26 (brs, 1H)

[Example 232]
1- (3-Amino-4,6-difluorophenyl) -7- (3,7-diazabicyclo [3.3.0] octane-3-yl) -6-fluoro-1,4-dihydro-4-oxo -1,8-naphthyridine-3-carboxylic acid hydrochloride:
1- (3-Amino-4,6-difluorophenyl) -7-chloro-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and 3-t-butoxycarbonyl The title compound was obtained in the same manner as in Example 231 except that -3,7-diazabicyclo [3.3.0] octane was used.
Properties: Pale yellow powder melting point: 203.0-208.0 ° C
¹ H NMR (d ₆ -DMSO) δ;
3.06 (brs, 4H), 3.36 (brs, 2H), 3.40-3.90 (m, 4H), 7.12 (t, 1H), 7.42 (t, J = 11 Hz, 1H), 8.09 (d, J = 13 Hz, 1H), 8.72 (s, 1H), 9.46 (brs, 2H)

[Example 233]
1- (3-Amino-4,6-difluorophenyl) -7- (3,7-diazabicyclo [3.3.0] octane-3-yl) -6-fluoro-1,4-dihydro-4-oxo Quinoline-3-carboxylic acid hydrochloride:
1- (3-amino-4,6-difluorophenyl) -6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-t-butoxycarbonyl-3,7-diazabicyclo [ 3.3.0] The title compound was obtained in the same manner as in Example 231 except that octane was used.
Properties; Yellow powder melting point: 221-224.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
2.95-3.20 (m, 4H), 3.25-3.65 (m, 6H), 6.06 (d, 1H), 7.12 (t, 1H), 7.53 (t, 1H), 7.91 (d, J = 14 Hz, 1H), 8.67 (s, 1H), 9.30-9.70 (br, 2H)

[Example 234]
1- (3-Amino-4,6-difluorophenyl) -7- (3-aminoethylazetidin-1-yl) -8-chloro-6-fluoro-1,4-dihydro-4-oxoquinoline-3 -Carboxylic acid trifluoroacetate:
1- (3-amino-4,6-difluorophenyl) -8-chloro-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-t-butoxycarbonylaminoethylazeti The reaction was conducted in the same manner as in Example 231 except that gin and triethylamine were used. Deprotection gave the title compound using trifluoroacetic acid instead of 4N hydrochloric acid / dioxane.
Properties; Yellow powder melting point: 140.0-141.5 ° C
¹ H NMR (d ₆ -DMSO) δ;
1.80-1.95 (m, 2H), 2.60-2.85 (m, 3H), 4.14 (brs, 2H), 4.57 (brs, 2H), 6.95 (dd, J = 7 Hz, J = 9 Hz, 1H), 7.36 (t, J = 11 Hz, 1H), 7.70 (brs, 3H), 7.87 (d, J = 13.5 Hz, 1H), 8. 45 (s, 1H)

Example 235
5-Benzyloxy-1- (3-benzyloxycarbonylamino-4,6-difluorophenyl) -6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid ethyl ester:
Ethyl 6-benzyloxy-2,3,4,5-tetrafluorobenzoyl acetate (1.11 g), ethyl orthoformate (0.75 ml) and acetic anhydride (0.85 ml) were stirred at 130 ° C. for 1 hour. Distilled off under reduced pressure. To the residue was added 10 ml of dichloromethane. N-benzyloxycarbonyl-2,4-difluoro-m-phenylenediamine 0.8g was added here, and it stirred at room temperature for 2 hours. The solvent was distilled off under reduced pressure. This was dissolved in 3 ml of N, N-dimethylformamide. 0.41 g of potassium carbonate was added and stirred at 100 ° C. for 10 minutes. 50 ml of 5% citric acid was added to the reaction solution. Extracted with 50 ml of chloroform. The organic layer was washed with saturated brine and dried over magnesium sulfate. Distilled off under reduced pressure. The residue was subjected to column chromatography (silica gel, chloroform / ethyl acetate = 20/1). 1.4 g of the above compound as a red oil was obtained.
Properties: Red oil
¹ H NMR (CDCl ₃ ) δ;
1.37 (t, J = 7 Hz, 3H), 4.38 (t, J = 7 Hz, 2H), 5.21 (s, 1H), 5.26 (s, 1H), 7.01 (s, 1H), 7.08 (t, J = 10 Hz, 1H), 7.25-7.55 (brs, 8H), 7.55-7.65 (m, 2H), 8.14 (s, 1H) , 8.40 (brs, 1H)

[Example 236]
1- (3-Amino-4,6-difluorophenyl) -5-hydroxy-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid:
1.3 g of the compound synthesized in Example 235 was added to 8 ml of acetic acid and 10 ml of 6N-hydrochloric acid, and stirred at 100 ° C. for 4 hours. The solvent was distilled off under reduced pressure. Water was added to the residue. The solid was collected by filtration. Washed with water, ethanol, isopropyl ether. 0.55 g of the above compound as a yellow solid was obtained.
Properties; Melting point of yellow powder:> 278.0 ° C. (decomposition)
¹ H NMR (d ₆ -DMSO) δ;
5.47 (brs, 2H), 7.08 (dd, J = 8 Hz, J = 9 Hz, 1H), 7.41 (dd, J = 10 Hz, J = 11 Hz, 1H), 8.59 (s, 1H) )

[Example 237]
1- (3-amino-4,6-difluorophenyl) -7- (3-aminoazetidin-1-yl) -6,8-difluoro-5-hydroxy-1,4-dihydro-4-oxoquinoline- 3-carboxylic acid:
1- (3-Amino-4,6-difluorophenyl) -5-hydroxy-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid and 3-aminoazetidine The title compound was obtained in the same manner as in Example 117 except that hydrochloride and triethylamine were used.
Properties; Yellow powder melting point:> 261 ° C. (decomposition)
¹ HNMR (d ₆ -DMSO + d-TFA) δ;
3.93 (brs, 1H), 4.14 (brs, 2H), 4.48 (brs, 2H), 5.43 (brs, 2H), 7.04 (t, 1H), 7.36 (t , J = 10 Hz, 1H), 8.36 (s, 1H)

[Test Example 1]
Antibacterial action:
The minimum inhibitory concentration (MIC: μg / ml) was measured according to the standard method of the Japanese Society of Chemotherapy (CHEMOTHERAPY, 29 (1), 76.1981). The results are shown in Table 1.

[Test Example 2]
Cytotoxicity test:
HelaS3 cells and IMR32 cells (5 × 10 3 cells / well, 4 × 10 4 cells / well each) suspended in Eagle's MEM medium supplemented with 10% fetal bovine serum and 0.1 mM non-essential amino acids in each well of a 96-well tissue culture plate Was inoculated. Various concentrations of drugs were added, and the cells were cultured at 37 ° C. for 6 hours in the presence of 5% CO 2. After the cultivation, the cells were fixed with 5% glutaraldehyde and stained with 0.05% methylene blue. Further, the dye was extracted with 0.3N HCl, the absorbance was measured at a wavelength of 650 nm, and the IC50 value was calculated. The results are shown in Table 2.

[Test Example 3]
Phototoxicity test:
Female ICR mice (5-6 weeks old) were intravenously administered (40 mg / kg / 10 ml) with the test compound, and then irradiated with ultraviolet rays (320-400 nm, 1.8 mW / cm 2 / sec) for 4 hours. Immediately after irradiation, 0 hour was set, and ear abnormalities were observed after 24 and 48 hours. Ear abnormalities were evaluated as no abnormalities (0 points), mild erythema (1 point), moderate erythema (2 points), severe erythema or edema (3 points). The results are shown in Table 3.

[Test Example 4]
Chromosome abnormality test:
A 60 mm dish was inoculated with CHL cells (0.2-2 × 10 5 cells / well) suspended in Eagle's MEM medium supplemented with 10% fetal bovine serum. The cells were pre-cultured at 37 ° C. for 4 to 72 hours in the presence of 5% CO 2, exchanged with media containing various concentrations of drugs, and then cultured under the same conditions. In the case of the metabolic activation method (S9-added medium), after culturing for 6 hours, the medium was replaced with a drug and S9-free medium and further cultured for 18 hours. In the case of the direct method, two types of culture were performed for 24 hours and 48 hours. After culturing, a chromosome sample was prepared based on a standard method of the Japanese Society for Environmental Mutagenology, and after observation of 100 metaphase images with a microscope, the proportion of structural abnormalities was calculated.
As a result, the compounds of Example 48 and Example 117 were negative from 0 to 200 μg / ml.

Claims (2)

The following general formula (1)

[Wherein, R ¹ represents a hydrogen atom or a carboxy protecting group, and R ² represents a nitro group, an amino group, a lower alkyl group, a lower alkenyl group, an aralkyl group having 7 to 11 carbon atoms, or an aryl having 6 to 14 carbon atoms. Group, formyl group, lower alkanoyl group, lower alkoxycarbonyl group, aroyl group having 7 to 15 carbon atoms, amino acid residue or oligopeptide residue, and these functional groups are commonly used in peptide chemistry such as acyl group and lower aralkyl. An amino acid residue or oligopeptide residue protected with a group, or a substituted amino group substituted with a cyclic amino group, R ³ represents a halogen atom, and R ⁴ and R ⁵ may be the same or different hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, R ⁶ is a hydrogen atom, a halogen atom, hydroxy group, lower alkyl group or Shows the amino group, R ⁷ represents a hydrogen atom or a halogen atom, A is a nitrogen atom or -CX = (wherein, X represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group) a, Z Is the following formula (a)

(Wherein e represents a number of 3 or 4, J ¹ , J ² and J ³ may be the same or different, and are a hydrogen atom, a hydroxyl group, a lower alkyl group, an amino lower alkyl group, an amino group, a lower group, An alkylamino group, a lower alkoxy group and a halogen atom). ]
Or a salt thereof.   An antibacterial agent comprising the pyridonecarboxylic acid derivative or salt thereof according to claim 1 as an active ingredient.