JP2008247835A - Process for producing β-diketone compound having methoxy group - Google Patents
Process for producing β-diketone compound having methoxy group Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 title claims abstract description 18
- -1 ketone compound Chemical class 0.000 claims abstract description 42
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 24
- 150000001733 carboxylic acid esters Chemical class 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims description 13
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 9
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 150000001340 alkali metals Chemical group 0.000 claims description 3
- 125000005843 halogen group Chemical group 0.000 claims description 3
- BDAWXSQJJCIFIK-UHFFFAOYSA-N potassium methoxide Chemical compound [K+].[O-]C BDAWXSQJJCIFIK-UHFFFAOYSA-N 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- 239000002168 alkylating agent Substances 0.000 abstract description 4
- 229940100198 alkylating agent Drugs 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 23
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 9
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical class CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OUNRWDLUPDQNLN-UHFFFAOYSA-N CC(C)CC(=O)CC(=O)C(C)(C)OC Chemical compound CC(C)CC(=O)CC(=O)C(C)(C)OC OUNRWDLUPDQNLN-UHFFFAOYSA-N 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000012044 organic layer Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003905 agrochemical Substances 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004440 column chromatography Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 150000004696 coordination complex Chemical class 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DKZPDGJXVYLKHD-UHFFFAOYSA-N C#C.COC Chemical compound C#C.COC DKZPDGJXVYLKHD-UHFFFAOYSA-N 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- XYVQFUJDGOBPQI-UHFFFAOYSA-N Methyl-2-hydoxyisobutyric acid Chemical compound COC(=O)C(C)(C)O XYVQFUJDGOBPQI-UHFFFAOYSA-N 0.000 description 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N N-phenyl amine Natural products NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 150000002641 lithium Chemical group 0.000 description 1
- PQUSVJVVRXWKDG-UHFFFAOYSA-N methyl 2-bromo-2-methylpropanoate Chemical compound COC(=O)C(C)(C)Br PQUSVJVVRXWKDG-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 125000004436 sodium atom Chemical group 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
【課題】 本発明の課題は、安全なアルキル化剤を使用して、簡便な方法にてメトキシ基を有するβ-ジケトン化合物を得る、工業的に好適なメトキシ基を有するβ-ジケトン化合物の製法を提供することにある。
【解決手段】 本発明の課題は、ハロゲン化カルボン酸エステル、ケトン化合物及びアルカリ金属アルコキシドとを反応させて、ハロゲン化β-ジケトン化合物を製造する第1工程、
(B)次いで、ハロゲン化β-ジケトン化合物とアルカリ金属メトキシドとを反応させる第2工程
のふたつの工程を含んでなる、メトキシ基を有するβ-ジケトン化合物の製法によって解決される。
【選択図】 なしPROBLEM TO BE SOLVED: To obtain an industrially suitable β-diketone compound having a methoxy group, which uses a safe alkylating agent to obtain a β-diketone compound having a methoxy group by a simple method. Is to provide.
The subject of the present invention is a first step of producing a halogenated β-diketone compound by reacting a halogenated carboxylic acid ester, a ketone compound and an alkali metal alkoxide,
(B) Next, this is solved by a process for producing a β-diketone compound having a methoxy group, which comprises two steps of the second step of reacting a halogenated β-diketone compound with an alkali metal methoxide.
[Selection figure] None
Description
本発明は、例えば、医薬・農薬等の合成中間体や金属錯体形成のための配位子として有用なメトキシ基を有するβ-ジケトン化合物の製法に関する。 The present invention relates to a method for producing a β-diketone compound having a methoxy group that is useful as a synthetic intermediate for pharmaceuticals, agricultural chemicals, and the like and a ligand for forming a metal complex.
従来、メトキシ基を有するβ-ジケトン化合物を製造する方法としては、例えば、2-ヒドロキシイソ酪酸メチルとハロゲン化アルキルとを反応させて2-アルコキシイソ酪酸メチルを合成した後、次いで、ケトン化合物を反応させる方法が知られている(例えば、非特許文献1参照)。又、アセチレン、ケトン化合物及びジメチル硫酸を反応させてアセチレンカルビノールメチルエーテルを合成し、次いで、ハロゲン化アセチル、アニリン化合物、酸の順で反応させる方法が知られている(例えば、非特許文献2及び3参照)。しかしながら、これらの方法では、発ガン性や毒性を有するアルキル化剤を使用しなければならず、工業的なメトキシ基を有するβ-ジケトン化合物の製法としては問題があった。
本発明の課題は、即ち、上記問題点を解決し、安全なアルキル化剤を使用して、簡便な方法にてメトキシ基を有するβ-ジケトン化合物を得る、工業的に好適なメトキシ基を有するβ-ジケトン化合物の製法を提供することにある。 The object of the present invention is to provide an industrially suitable methoxy group that solves the above problems and obtains a β-diketone compound having a methoxy group by a simple method using a safe alkylating agent. It is to provide a method for producing a β-diketone compound.
(A)一般式(1) (A) General formula (1)
(式中、Xは、ハロゲン原子、R1、R2及びR3は、同一又は異なっていても良く、炭素原子数1〜4の直鎖又は分岐状のアルキル基を示す。)
で示されるハロゲン化カルボン酸エステル、一般式(2)
(In the formula, X is a halogen atom, R 1 , R 2 and R 3 may be the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms.)
A halogenated carboxylic acid ester represented by the general formula (2)
(式中、R4は、炭素原子数1〜5の直鎖又は分岐状のアルキル基を示す。)
で示されるケトン化合物及び一般式(3)
(In the formula, R 4 represents a linear or branched alkyl group having 1 to 5 carbon atoms.)
And a ketone compound represented by the general formula (3)
(式中、Mは、アルカリ金属原子を示し、R5は、炭素原子数1〜4の直鎖又は分岐状のアルキル基を示す。
で示されるアルカリ金属アルコキシドとを反応させて、一般式(4)
(In the formula, M represents an alkali metal atom, and R 5 represents a linear or branched alkyl group having 1 to 4 carbon atoms.
Is reacted with an alkali metal alkoxide represented by the general formula (4)
(式中、R2、R3、R4及びXは、前記と同義である。)
で示されるハロゲン化β-ジケトン化合物を製造する第1工程、
(B)次いで、ハロゲン化β-ジケトン化合物とアルカリ金属メトキシドとを反応させる第2工程
のふたつの工程を含んでなる、一般式(5)
(In the formula, R 2 , R 3 , R 4 and X are as defined above.)
A first step for producing a halogenated β-diketone compound represented by the formula:
(B) Next, the general formula (5) comprising two steps of the second step of reacting the halogenated β-diketone compound and the alkali metal methoxide.
(式中、R2、R3及びR4は、前記と同義である。)
で示されるメトキシ基を有するβ-ジケトン化合物の製法。
(In the formula, R 2 , R 3 and R 4 are as defined above.)
A process for producing a β-diketone compound having a methoxy group represented by the formula:
本発明により、安全なアルキル化剤を使用して、簡便な方法にてメトキシ基を有するβ-ジケトン化合物を得る、工業的に好適なメトキシ基を有するβ-ジケトン化合物の製法を提供することができる。 According to the present invention, there is provided an industrially suitable method for producing a β-diketone compound having a methoxy group, which uses a safe alkylating agent to obtain a β-diketone compound having a methoxy group by a simple method. it can.
(A)第1工程
本発明の第1工程の反応において使用するハロゲン化カルボン酸エステルは、前記の一般式(1)において示される、その一般式(1)において、Xは、ハロゲン原子を示すが、例えば、フッ素原子、塩素原子、臭素原子、ヨウ素原子等を示す。又、R1、R2及びR3は、同一又は異なっていても良く、炭素原子数1〜4の直鎖又は分岐状のアルキル基を示すが、例えば、メチル基、エチル基、n-プロピル基、イソプロピル基、n-ブチル基、sec-ブチル基、イソブチル基、t-ブチル基等のアルキル基が挙げられる。
(A) First Step The halogenated carboxylic acid ester used in the reaction of the first step of the present invention is represented by the general formula (1). In the general formula (1), X represents a halogen atom. Represents, for example, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or the like. R 1 , R 2 and R 3 may be the same or different and each represents a linear or branched alkyl group having 1 to 4 carbon atoms, such as a methyl group, an ethyl group, or n-propyl. And alkyl groups such as isopropyl group, isopropyl group, n-butyl group, sec-butyl group, isobutyl group and t-butyl group.
本発明の第1工程の反応において使用するケトン化合物は、前記の一般式(2)において示される。その一般式(2)において、R4は、炭素原子数1〜5の直鎖又は分岐状のアルキル基を示すが、例えば、メチル基、エチル基、n-プロピル基、イソプロピル基、n-ブチル基、sec-ブチル基、イソブチル基、t-ブチル基、ペンチル基等のアルキル基が挙げられる。 The ketone compound used in the reaction of the first step of the present invention is represented by the general formula (2). In the general formula (2), R 4 represents a linear or branched alkyl group having 1 to 5 carbon atoms, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl. Group, sec-butyl group, isobutyl group, t-butyl group, alkyl group such as pentyl group.
前記ケトン化合物の使用量は、ハロゲン化カルボン酸エステル1モルに対して、好ましくは0.1〜30モル、更に好ましくは0.5〜10モルである。 The amount of the ketone compound used is preferably 0.1 to 30 mol, more preferably 0.5 to 10 mol, per 1 mol of the halogenated carboxylic acid ester.
本発明の第1工程の反応において使用するアルカリ金属アルコキシドは、前記の一般式(3)において示される。その一般式(3)において、Mは、アルカリ金属原子を示し、例えば、リチウム原子、ナトリウム原子、カリウム原子等が挙げられる。又、R5は、炭素原子数1〜4の直鎖又は分岐状のアルキル基を示すが、前記R1からR3で示したものと同義である。 The alkali metal alkoxide used in the reaction of the first step of the present invention is represented by the general formula (3). In the general formula (3), M represents an alkali metal atom, and examples thereof include a lithium atom, a sodium atom, and a potassium atom. R 5 represents a linear or branched alkyl group having 1 to 4 carbon atoms and has the same meaning as that represented by R 1 to R 3 .
前記アルカリ金属アルコキシドの使用量は、ハロゲン化カルボン酸エステル1モルに対して、好ましくは0.1〜10モル、更に好ましくは0.5〜5モルである。 The amount of the alkali metal alkoxide to be used is preferably 0.1 to 10 mol, more preferably 0.5 to 5 mol, per 1 mol of the halogenated carboxylic acid ester.
本発明の第1工程の反応は、溶媒の存在下又は非存在下において行われる。使用される溶媒としては、反応を阻害しないものならば特に限定されず、例えば、ヘキサン、ヘプタン、オクタン、シクロヘキサン、メチルシクロヘキサン等の脂肪族炭化水素類;トルエン、キシレン等の芳香族炭化水素;ジエチルエーテル、ジブチルエーテル、ジメトキシエタン、テトラヒドロフラン、ジオキサン等のエーテル類;N,N−ジメチルホルムアミド、N,N-ジメチルアセトアミド、N-メチルピロリドン等のアミド類が挙げられるが、好ましくは脂肪族炭化水素類、エーテル類が使用される。なお、これらの溶媒は、単独又は二種以上を混合して使用しても良い。 The reaction of the first step of the present invention is performed in the presence or absence of a solvent. The solvent to be used is not particularly limited as long as it does not inhibit the reaction. For example, aliphatic hydrocarbons such as hexane, heptane, octane, cyclohexane and methylcyclohexane; aromatic hydrocarbons such as toluene and xylene; diethyl Ethers such as ether, dibutyl ether, dimethoxyethane, tetrahydrofuran and dioxane; and amides such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methylpyrrolidone, preferably aliphatic hydrocarbons Ethers are used. In addition, you may use these solvents individually or in mixture of 2 or more types.
前記溶媒の使用量は、反応液の均一性や撹拌性等により適宜調節するが、ハロゲン化カルボン酸エステル1gに対して、好ましくは0〜1100g、更に好ましくは1〜50gである。 The amount of the solvent used is appropriately adjusted depending on the uniformity of the reaction solution, the stirring ability, etc., but is preferably 0 to 1100 g, more preferably 1 to 50 g, based on 1 g of the halogenated carboxylic acid ester.
本発明の第1工程の反応は、例えば、ハロゲン化カルボン酸エステル、ケトン化合物、アルカリ金属アルコキシド及び溶媒を混合し、撹拌しながら反応させる等の方法によって行われる。その際の反応温度は、好ましくは-20〜70℃、更に好ましくは0〜50℃であり、反応圧力は特に制限されない。 The reaction in the first step of the present invention is performed, for example, by a method of mixing a halogenated carboxylic acid ester, a ketone compound, an alkali metal alkoxide, and a solvent and reacting them while stirring. The reaction temperature at that time is preferably -20 to 70 ° C, more preferably 0 to 50 ° C, and the reaction pressure is not particularly limited.
本発明の第1工程の反応の好ましい態様としては、
(1)アルカリ金属アルコキシドを溶媒中で撹拌させた後に、ケトン化合物とハロゲン化カルボン酸エステルを添加して反応させる方法、
(2)アルカリ金属アルコキシドとケトン化合物を溶媒中で撹拌させた後、ハロゲン化カルボン酸エステルを添加して反応させる方法
が挙げられるが、特に好ましくは前記(1)の方法で行われる。
As a preferable aspect of the reaction in the first step of the present invention,
(1) A method in which an alkali metal alkoxide is stirred in a solvent and then reacted by adding a ketone compound and a halogenated carboxylic acid ester;
(2) A method in which an alkali metal alkoxide and a ketone compound are stirred in a solvent and then reacted by adding a halogenated carboxylic acid ester is particularly preferable. The method (1) is particularly preferable.
反応終了後、一般式(4) After completion of the reaction, the general formula (4)
(式中、R2、R3、R4及びXは、前記と同義である。)
で示されるハロゲン化β-ジケトン化合物のアルカリ金属塩が得られるが、これは、例えば、ギ酸、酢酸等の有機酸;塩酸、硫酸、リン酸等の無機酸によって、遊離のハロゲン基を有するβ-ジケトン化合物のアルカリ金属塩とした後、引き続き、抽出、洗浄、乾燥、濾過、蒸留、再結晶、カラムクロマトグラフィー等の一般的な方法によって単離、精製される。
(In the formula, R 2 , R 3 , R 4 and X are as defined above.)
An alkali metal salt of a halogenated β-diketone compound represented by formula (1) can be obtained by, for example, an organic acid such as formic acid or acetic acid; an inorganic acid such as hydrochloric acid, sulfuric acid or phosphoric acid; -After making into an alkali metal salt of a diketone compound, it is subsequently isolated and purified by general methods such as extraction, washing, drying, filtration, distillation, recrystallization, column chromatography and the like.
(B)第2工程
本発明の第2工程の反応において使用するアルカリ金属メトキシドとしては、例えば、ナトリウムメトキシド、カリウムメトキシドが好適に使用される。なお、これらのアルカリ金属メトキシドは、単独又は二種以上を混合して使用しても良い。
(B) 2nd process As an alkali metal methoxide used in reaction of the 2nd process of this invention, sodium methoxide and potassium methoxide are used suitably, for example. In addition, you may use these alkali metal methoxides individually or in mixture of 2 or more types.
前記アルカリ金属アルコキシドの使用量は、ハロゲン化β-ジケトン化合物1モルに対して、好ましくは0.1〜10モル、更に好ましくは0.5〜5モルである。 The amount of the alkali metal alkoxide to be used is preferably 0.1 to 10 mol, more preferably 0.5 to 5 mol, per 1 mol of the halogenated β-diketone compound.
本発明の第2工程の反応は、溶媒の存在下又は非存在下において行われる。使用される溶媒としては、反応を阻害しないものならば特に限定されず、例えば、ヘキサン、ヘプタン、オクタン、シクロヘキサン、メチルシクロヘキサン等の脂肪族炭化水素類;トルエン、キシレン等の芳香族炭化水素;ジエチルエーテル、ジブチルエーテル、ジメトキシエタン、テトラヒドロフラン、ジオキサン等のエーテル類;N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、N-メチルピロリドン等のアミド類が挙げられるが、好ましくは脂肪族炭化水素類、エーテル類が使用される。なお、これらの溶媒は、単独又は二種以上を混合して使用しても良い。 The reaction in the second step of the present invention is performed in the presence or absence of a solvent. The solvent used is not particularly limited as long as it does not inhibit the reaction. For example, aliphatic hydrocarbons such as hexane, heptane, octane, cyclohexane, and methylcyclohexane; aromatic hydrocarbons such as toluene and xylene; diethyl Ethers such as ether, dibutyl ether, dimethoxyethane, tetrahydrofuran and dioxane; and amides such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methylpyrrolidone, preferably aliphatic hydrocarbons Ethers are used. In addition, you may use these solvents individually or in mixture of 2 or more types.
前記溶媒の使用量は、反応液の均一性や撹拌性等により適宜調節するが、ハロゲン化β-ジケトン化合物1gに対して、好ましくは0〜100g、更に好ましくは1〜50gである。 The amount of the solvent used is appropriately adjusted depending on the uniformity of the reaction solution, the stirring ability, etc., but is preferably 0 to 100 g, more preferably 1 to 50 g, relative to 1 g of the halogenated β-diketone compound.
本発明の第2工程の反応は、例えば、ハロゲン化β-ジケトン化合物、アルカリ金属メトキシド及び溶媒を混合し、撹拌しながら反応させる等の方法によって行われる。その際の反応温度は、好ましくは-20〜100℃、更に好ましくは0〜60℃であり、反応圧力は特に制限されない。 The reaction in the second step of the present invention is performed by, for example, a method of mixing a halogenated β-diketone compound, an alkali metal methoxide and a solvent and reacting them with stirring. The reaction temperature at that time is preferably −20 to 100 ° C., more preferably 0 to 60 ° C., and the reaction pressure is not particularly limited.
反応終了後、一般式(5) After completion of the reaction, the general formula (5)
(式中、R2、R3及びR4は、前記と同義である。)
で示されるメトキシ基を有するβ-ジケトン化合物のアルカリ金属塩が得られるが、これは、例えば、ギ酸、酢酸等の有機酸;塩酸、硫酸、リン酸等の無機酸によって、遊離のハロゲン基を有するβ-ジケトン化合物のアルカリ金属塩とした後、引き続き、抽出、洗浄、乾燥、濾過、蒸留、再結晶、カラムクロマトグラフィー等の一般的な方法によって単離、精製される。
(In the formula, R 2 , R 3 and R 4 are as defined above.)
An alkali metal salt of a β-diketone compound having a methoxy group represented by formula (1) can be obtained by, for example, forming an organic acid such as formic acid and acetic acid; After the β-diketone compound has an alkali metal salt, it is subsequently isolated and purified by a general method such as extraction, washing, drying, filtration, distillation, recrystallization, column chromatography and the like.
本発明によって得られるメトキシ基を有するβ-ジケトン化合物の具体例としては、式(6)〜式(19)で示す化合物が挙げられる。 Specific examples of the β-diketone compound having a methoxy group obtained by the present invention include compounds represented by formulas (6) to (19).
次に、実施例を挙げて本発見を具体的に説明するが、本発明の範囲はこれらに限定されるものではない。 Next, the present discovery will be specifically described with reference to examples, but the scope of the present invention is not limited thereto.
実施例1(2-ブロモ-2,7-ジメチル-3,5-オクタンジオンの合成)
撹拌装置、温度計及び滴下漏斗を備えた内容積500mlのフラスコに、アルゴン雰囲気下、ナトリウムメトキシド16.2g(0.3mol)及びメチルシクロヘキサン150mlを加えた。次いで、液温を6〜10℃に保ちながら、2-ブロモイソ酪酸メチル24.8g(0.137mol)と4-メチル-2-ペンタノン20.6g(0.20mol)の混合液をゆるやかに滴下し、撹拌しながら10℃で6時間反応させた。反応終了後、氷冷下、反応液に、酢酸36g(0.6mol)及び水50mlを加えた。次いで、有機層を分取した後、有機層を純水で洗浄し、無水硫酸ナトリウムで乾燥させた。濾過後、濾液を濃縮した後、濃縮物を減圧下で蒸留(70℃、133Pa)し、無色液体として、2-ブロモ-2,7-ジメチル-3,5-オクタンジオン11gを得た(単離収率:39%)。
Example 1 (Synthesis of 2-bromo-2,7-dimethyl-3,5-octanedione)
Sodium methoxide (16.2 g, 0.3 mol) and methylcyclohexane (150 ml) were added to a 500 ml flask equipped with a stirrer, thermometer and dropping funnel under an argon atmosphere. Next, while maintaining the liquid temperature at 6 to 10 ° C., slowly drop a mixed solution of methyl 2-bromoisobutyrate 24.8 g (0.137 mol) and 4-methyl-2-pentanone 20.6 g (0.20 mol) while stirring. The reaction was carried out at 10 ° C. for 6 hours. After completion of the reaction, 36 g (0.6 mol) of acetic acid and 50 ml of water were added to the reaction solution under ice cooling. Next, after separating the organic layer, the organic layer was washed with pure water and dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated, and the concentrate was distilled under reduced pressure (70 ° C., 133 Pa) to obtain 11 g of 2-bromo-2,7-dimethyl-3,5-octanedione as a colorless liquid (simple (Separation yield: 39%).
2-ブロモ-2,7-ジメチル-3,5-オクタンジオンの物性値は以下の通りであった。 The physical properties of 2-bromo-2,7-dimethyl-3,5-octanedione were as follows.
1H-NMR(CDCl3,δ(ppm));0.95〜0.98(6H,d)、1.91(6H,s)、2.04〜2.17(1H,m)、2.18(2H,d)、3.92(0.182H,s)、5.92(0.909H,s)、14.99(0.909H,s)
IR(neat(cm-1));2961、2932、2872、1731、1705、1620、1598、1464、1436、1387、1369、1335、1310、1286、1255、1220、1186、1125、1106、1006、962、923
MS(m/e);250、208、168、127、85、41、15
1 H-NMR (CDCl 3 , δ (ppm)); 0.95 to 0.98 (6H, d), 1.91 (6H, s), 2.04 to 2.17 (1H, m), 2.18 (2H, d), 3.92 (0.182H , s), 5.92 (0.909H, s), 14.99 (0.909H, s)
IR (neat (cm -1 )); 2961, 2932, 2872, 1731, 1705, 1620, 1598, 1464, 1436, 1387, 1369, 1335, 1310, 1286, 1255, 1220, 1186, 1125, 1106, 1006, 962, 923
MS (m / e); 250, 208, 168, 127, 85, 41, 15
実施例2(2-メトキシ-2,7-ジメチル-3,5-オクタンジオンの合成)
撹拌装置、温度計及び滴下漏斗を備えた内容積100mlのフラスコに、アルゴン雰囲気下、ナトリウムメトキシド1.35g(25mmol)、メチルシクロヘキサン30mlを加えた。次いで、液温を40℃に保ちながら、2-ブロモ2,7-ジメチル-3,5-オクタンジオン6.0g(25mmol)をゆるやかに滴下し、40℃で4時間反応させた。反応終了後、水40gを加え、水層を分液した。得られた水層に酢酸6.0g(100mmol)を添加し、更にヘキサン50mlを添加した。有機層を水で水洗した後、無水硫酸ナトリウムで乾燥した。濾過後、濾液を濃縮した後、濃縮物を減圧下で蒸留(65℃、266Pa)し、無色液体として2-メトキシ-2,7-ジメチル-3,5-オクタンジオン2.5gを得た(単離収率:49%)。
なお、2-メトキシ-2,7-ジメチル3,5-オクタンジオンの物性値は以下の通りであった。
Example 2 (Synthesis of 2-methoxy-2,7-dimethyl-3,5-octanedione)
1.35 g (25 mmol) of sodium methoxide and 30 ml of methylcyclohexane were added to a 100 ml flask equipped with a stirrer, thermometer and dropping funnel under an argon atmosphere. Next, 6.0 g (25 mmol) of 2-bromo-2,7-dimethyl-3,5-octanedione was gently added dropwise while maintaining the liquid temperature at 40 ° C., and reacted at 40 ° C. for 4 hours. After completion of the reaction, 40 g of water was added and the aqueous layer was separated. To the obtained aqueous layer, 6.0 g (100 mmol) of acetic acid was added, and 50 ml of hexane was further added. The organic layer was washed with water and then dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated, and the concentrate was distilled under reduced pressure (65 ° C., 266 Pa) to obtain 2.5 g of 2-methoxy-2,7-dimethyl-3,5-octanedione as a colorless liquid (simple (Separation yield: 49%).
The physical properties of 2-methoxy-2,7-dimethyl 3,5-octanedione were as follows.
1H-NMR(CDCl3,δ(ppm));0.95〜0.97(6H,d)、1.35(6H,s)、2.01〜2.14(1H,m)、2.16(2H,d)、3.23(3H,s)、3.69(0.188H,s)、5.89(0.906H,s)、15.38(0.906H,s)
IR(neat(cm-1));2960、2936、2873、2830、1707、1616、1466、1361、1336、1288、1221、1181、1112、1075、964、937、893、869、834、801、754
MS(m/e);201、169、141、73、56、43、27
1 H-NMR (CDCl 3 , δ (ppm)); 0.95 to 0.97 (6H, d), 1.35 (6H, s), 2.01 to 2.14 (1H, m), 2.16 (2H, d), 3.23 (3H, s), 3.69 (0.188H, s), 5.89 (0.906H, s), 15.38 (0.906H, s)
IR (neat (cm -1 )); 2960, 2936, 2873, 2830, 1707, 1616, 1466, 1361, 1336, 1288, 1221, 1181, 1112, 1075, 964, 937, 893, 869, 834, 801, 754
MS (m / e); 201, 169, 141, 73, 56, 43, 27
本発明は、例えば、医薬・農薬等の合成中間体や金属錯体形成のための配位子として有用なメトキシ基を有するβ-ジケトン化合物の製法に関する。 The present invention relates to a method for producing a β-diketone compound having a methoxy group that is useful as a synthetic intermediate for pharmaceuticals, agricultural chemicals, and the like and a ligand for forming a metal complex.
Claims (3)
で示されるハロゲン化カルボン酸エステル、一般式(2)
で示されるケトン化合物及び一般式(3)
で示されるアルカリ金属アルコキシドとを反応させて、一般式(4)
で示されるハロゲン化β-ジケトン化合物を製造する第1工程、
(B)次いで、ハロゲン化β-ジケトン化合物とアルカリ金属メトキシドとを反応させる第2工程
のふたつの工程を含んでなる、一般式(5)
で示されるメトキシ基を有するβ-ジケトン化合物の製法。 (A) General formula (1)
A halogenated carboxylic acid ester represented by the general formula (2)
And a ketone compound represented by the general formula (3)
Is reacted with an alkali metal alkoxide represented by the general formula (4)
A first step for producing a halogenated β-diketone compound represented by the formula:
(B) Next, the general formula (5) comprising two steps of the second step of reacting the halogenated β-diketone compound and the alkali metal methoxide.
A process for producing a β-diketone compound having a methoxy group represented by the formula:
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