[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN109651418A - A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun - Google Patents

A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun Download PDF

Info

Publication number
CN109651418A
CN109651418A CN201910079162.1A CN201910079162A CN109651418A CN 109651418 A CN109651418 A CN 109651418A CN 201910079162 A CN201910079162 A CN 201910079162A CN 109651418 A CN109651418 A CN 109651418A
Authority
CN
China
Prior art keywords
compound
buddhist nun
laura
reactor
added
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910079162.1A
Other languages
Chinese (zh)
Inventor
陈力
赵跃
刘静静
陈晨
王旭
万新锋
谭学优
王杰明
张鹏伟
许国欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anqing Hui Hui Biological Technology Co Ltd
Original Assignee
Anqing Hui Hui Biological Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anqing Hui Hui Biological Technology Co Ltd filed Critical Anqing Hui Hui Biological Technology Co Ltd
Priority to CN201910079162.1A priority Critical patent/CN109651418A/en
Publication of CN109651418A publication Critical patent/CN109651418A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic Table
    • C07F5/02Boron compounds
    • C07F5/025Boronic and borinic acid compounds
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D498/00Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D498/12Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains three hetero rings
    • C07D498/18Bridged systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

The invention discloses a kind of Lauras to replace Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, wherein Laura replaces the structure of Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate as shown in compound 2:It is starting material according to synthetic route prepare compound 2 as follows with compound 1:The present invention is disclosed with compound 2 as starting material simultaneously, and machine catalyzing by metal palladium coupling prepares the method that Laura replaces Buddhist nun:Not only process route is short for synthetic route disclosed by the invention, and synthesis yield is high, and high financial profit.

Description

A kind of Laura is prepared for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling The method that Laura replaces Buddhist nun
Technical field
The present invention relates to pharmaceutical synthesis fields, and in particular to be a kind of Laura for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and organic Catalyzing by metal palladium coupling prepares the method that Laura replaces Buddhist nun.
Background technique
Laura is one potent for Buddhist nun (Lorlatinib), the inhibitor of dual ALK/ROS1, is clinically used for cancer Treatment, Laura replace the structure of Buddhist nun as shown in formula A:
The synthetic route of Buddhist nun is replaced about Laura, Patents documents and paper periodical have been reported that, such as world patent number Are as follows: WO.2013132376A1, it was recently reported that Laura replaces Buddhist nun's synthetic route as shown in formula B:
In synthetic route shown in formula B, using Ⅹ Ⅻ compound of formula as starting material intermediate, it is coupled by Suzuki, it will Ⅹ Ⅻ compound of formula is coupled with Ⅹ VIII compounds, then is deprotected, is hydrolyzed, and is finally condensed cyclization and is obtained object construction production Object.
But the prior art is disclosed to synthesize the side that Laura replaces Buddhist nun about Ⅹ Ⅻ compound of formula for starting material intermediate Method, not only process route is tediously long, and synthesis total recovery is low, and causing Laura to have not only for the synthesis of Buddhist nun, process costs are high, and grasp Make the defects of step is more.
Therefore, a kind of completely new intermediate that can be synthesized Laura and replace Buddhist nun is developed, and synthesizes Laura using the intermediate For the method for Buddhist nun, defective workmanship disclosed in above-mentioned prior art is overcome, the industrialization production meaning weight of Buddhist nun is replaced for improving Laura Greatly.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of Laura for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and organic Catalyzing by metal palladium coupling prepares the method that Laura replaces Buddhist nun.
The present invention is to solve above-mentioned technical problem by the following technical programs:
A kind of Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, and structure is as shown in compound 1:
The synthetic route of above compound 1 is as follows:
Compound 1 the preparation method is as follows:
Successively organic solvent is added as molten in reactor in Weigh Compound X, duplex pinacol borate, inorganic base Agent is stirred, and under the conditions of nitrogen protection, organic metal palladium catalyst is added, finishes, and logical nitrogen drives air in reactor, reaction System is warming up to 70-80 DEG C, and insulation reaction 4-5h, TLC detect fully reacting, reaction solution concentration, extraction, isolated compound 1。
Preferably, the additional amount of the palladium catalyst is the 3% of compound X mass, the compound X and duplex pinacol Borate, inorganic base molar ratio be 1:1.2:1.2.
Preferably, the organic metal palladium catalyst is Pd (Dppf)2Cl2Or Pd (Ph3P)4, the organic solvent is Benzene, toluene, DMF, NMP, any solvent in Isosorbide-5-Nitrae-dioxane, the inorganic base are potassium carbonate, any in sodium carbonate Kind alkali.
Preferably, Laura is prepared for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate for Buddhist nun with Laura, synthetic route is as follows:
The present invention is disclosed using Laura for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate as starting material simultaneously, Organometallic Palladium catalytic coupling The method that Laura replaces Buddhist nun is prepared, synthetic route is as follows:
Above-mentioned Organometallic Palladium catalytic coupling prepare Laura for Buddhist nun method the following steps are included:
The preparation of S1, compound 3: successively Weigh Compound 1, compound 2, potassium carbonate, organic metal palladium catalyst are added Into reactor, after organic solvent is added in reactor, it is passed through nitrogen into reaction system and drives air, reaction system is warming up to 70-80 DEG C, insulation reaction 4-5h fully reacting, to complete, reaction system is cooled to room temperature for TLC detection reaction, after separating water layer, Reaction solution is concentrated under reduced pressure, and obtains compound 3;
The preparation of S2, compound 4:
After reactor is added in Weigh Compound 3, organic solvent, water, potassium hydroxide, reaction system stirring are added in reactor It is warming up to 25-35 DEG C, insulation reaction 4-5h, solvent is recovered under reduced pressure to dry, addition dilute hydrochloric acid solution to reactor in fully reacting In, it is stirred to react 35-40min, TLC detection reaction terminates, continues to add hydrochloric acid tune reaction solution pH to 2.0-3.0, filter, filter cake Drying, obtains compound 4;
S3, Laura replace the preparation of Buddhist nun:
Compound 4, DMF, DIPEA are successively added into reactor, stirs, HATU is added to reactor in whipping process In, 60~70 DEG C of reactions are warming up to, after fully reacting, water quenching reaction is added in insulation reaction 4-5h, after being extracted, being separated Buddhist nun is replaced to Laura.
Preferably, the molar ratio of compound 1 and compound 2, potassium carbonate is 1:1.1:2 in the step S1, described organic The additive amount of metal palladium catalyst is the 7% of 1 mass of compound, the molar ratio of compound 3 and potassium hydroxide in the step S2 For 1:1.1, the molar ratio of compound 4 and DIPEA, HATU are 1:1.2:3 in the step S3.
Preferably, the organic metal palladium catalyst is Pd (Dppf)2Cl2Or Pd (Ph3P)4, the organic solvent is Benzene, toluene, DMF, NMP, any solvent in Isosorbide-5-Nitrae-dioxane.
The present invention has the advantage that compared with prior art
The present invention discloses a kind of Laura and prepares Laura for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling and replace The method of Buddhist nun is compared with prior art, relatively traditional the present invention provides the synthesis route that the Laura of a grain husk grain husk replaces Buddhist nun Process route, synthesis route disclosed by the invention is not only at low cost and high income, environment-friendly and green have industrial applications Prospect.
Detailed description of the invention
Fig. 1 is the hydrogen spectrogram that Laura replaces Buddhist nun in the embodiment of the present invention 2;
Fig. 2 is that the Laura being prepared in the embodiment of the present invention 2 replaces the liquid phase figure of Buddhist nun;
Wherein, liquid phase figure is that Laura will be prepared in embodiment 2 to be detected for Nietzsche with LC-MS, and liquid phase figure is LC- MS detects the liquid phase figure part in spectrogram;
Fig. 3 is that the Laura being prepared in the embodiment of the present invention 2 replaces the mass spectrogram of Buddhist nun;
Wherein, mass spectrogram is that Laura will be prepared in embodiment 2 to be detected for Nietzsche with LC-MS, mass spectrogram LC- MS detects the mass spectrogram part in spectrogram.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation Example.
Embodiment 1
A kind of Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, and structure is as shown in compound 1:
Embodiment 2
A kind of Laura being prepared using embodiment 1 replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate as starting material, Organometallic Palladium Catalytic coupling prepares Laura for Buddhist nun, and synthetic route is as follows:
The preparation of compound 1:
A kind of Laura is as follows for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, that is, compound 1 synthetic route:
The preparation method of compound 1, comprising the following steps:
Successively by compound X (32.9g, 0.1mol), duplex pinacol borate (30.47g, 0.12mol), potassium carbonate Isosorbide-5-Nitrae-dioxane of 500mL is added as solvent, stirring, nitrogen protection condition in reactor in (16.58g, 0.12mol) Under, it is added 0.98g Pd (Dppf)2Cl2As catalyst (catalyst quality is the 3% of 1 mass of compound), finishes, lead to nitrogen Air in reactor is driven, reaction system is warming up to 75 DEG C, and reaction solution is concentrated for insulation reaction 4h, TLC detection fully reacting It is dry, ethyl acetate 300mL, water 200mL is added, organic phase is collected in stirring, layering, and aqueous layer with ethyl acetate 300mL extracts one again It is secondary, merge organic phase, carries out column chromatography for separation after organic phase concentration, obtain compound 1 (32.9g), yield 87.5%.
The preparation of compound 3:
The synthetic route of compound 3 is as follows:
The preparation method of compound 3, comprising the following steps:
Successively Weigh Compound 1 (37.6g, 0.1mol), compound 2 (40.48g, 0.11mol), potassium carbonate (27.6g, 0.2mol)、1.13g Pd(Dppf)2Cl2(the 3% of 1 gross mass of compound) as catalyst in reactor, add in reactor After the Isosorbide-5-Nitrae-dioxane for entering 300mL, it is passed through nitrogen into reaction system and drives air, reaction system is warming up to 80 DEG C, heat preservation 4h fully reacting is reacted, to complete, reaction system is cooled to room temperature for TLC detection reaction, and after separating water layer, reaction solution decompression is dense Contracting, obtains compound 3 (36.7g), yield 83.6%.
The preparation of compound 4:
The synthetic route of compound 4 is as follows:
The preparation method of compound 4, comprising the following steps:
Weigh Compound 3 (43.8g, 0.1mol) be added reactor in, in reactor be added 200mL methanol, 100mL water, Potassium hydroxide (6.2g, 0.11mol), reaction system stirring are warming up to 30 DEG C, insulation reaction 4h, and fully reacting is recovered under reduced pressure molten Dilute hydrochloric acid solution is added into reactor to doing in agent, is stirred to react 40min, and TLC detection reaction terminates, continues to add hydrochloric acid tune Reaction solution pH to 2.0 is filtered, and filter cake drying obtains compound 4 (42.1g), yield 99.2%.
Four, final product Laura replaces the preparation of Buddhist nun:
Laura is as follows for the synthetic route of Buddhist nun:
Prepare the method that Laura replaces Buddhist nun, comprising the following steps:
Successively into reactor be added compound 4 (42.4g, 0.1mol), 500mLDMF, DIPEA (15.51g, 0.12mol), it stirs, HATU (114.12g, 0.3mol) is added into reactor in whipping process, is warming up to 65 DEG C of reactions, Insulation reaction 5h after fully reacting, after water 500mL quenching reaction is added, in reactor, is added 500mL ethyl acetate and is extracted It takes, separates water layer, after water layer is extracted again with 500mL ethyl acetate, be associated with ethyl acetate layer, it is dense after ethyl acetate is concentrated Contracting object obtains Laura through column chromatography for separation for Buddhist nun (31.87g), yield 78.5%, the structural characterization and content that Laura replaces Buddhist nun are such as Shown in Fig. 1-3.
Wherein, Fig. 2 is that Laura replaces the LC-MS of Buddhist nun to detect the liquid phase figure detection part in spectrogram, and each peak number rises in spectrogram Time beginning, retention time, end time, peak height, peak area, peak area percent are as shown in table 1:
Table 1
Wherein, Fig. 3 is that Laura detects Mass Spectrometer Method part in spectrogram for the LC-MS of Buddhist nun, in spectrogram each mass-to-charge ratio from Sub- peak value, abundance are as shown in table 2:
Table 2
Matter/lotus ratio Charge number Abundance
407.231 1 19472474
407.4078 1 1165409.25
408.4127 1 5367392.5
409.2366 1 378438.09
429.2147 1 786435.31
430.2179 1 1269463.25
445.1902 1 267908.06
835.4063 1 1447246.25
836.4094 1 750105.06
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (9)

1. a kind of Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, which is characterized in that structure is as shown in compound 1:
2. a kind of Laura according to claim 1 replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, which is characterized in that the compound 1 Synthetic route it is as follows:
The compound 1 the preparation method is as follows:
Successively Weigh Compound X, duplex pinacol borate, inorganic base are added organic solvent as solvent, stir in reactor It mixes, under the conditions of nitrogen protection, organic metal palladium catalyst is added, finishes, logical nitrogen drives air in reactor, reaction system liter For temperature to 70-80 DEG C, insulation reaction 4-5h, TLC detect fully reacting, reaction solution concentration, extraction, isolated compound 1.
3. a kind of Laura according to claim 2 replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, which is characterized in that the palladium catalyst Additional amount be the 3% of compound X mass, the compound X and duplex pinacol borate, inorganic base molar ratio be 1: 1.2:1.2。
4. the preparation method that a kind of Laura according to claim 3 replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, which is characterized in that institute Stating organic metal palladium catalyst is Pd (Dppf)2Cl2Or Pd (Ph3P)4, the organic solvent be benzene, toluene, DMF, NMP, 1, Any solvent in 4- dioxane, the inorganic base are potassium carbonate, any alkali in sodium carbonate.
5. a kind of Laura according to claim 4 replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate, which is characterized in that be with compound 1 Starting material prepares Laura for Buddhist nun, and synthetic route is as follows:
6. a kind of use Laura as described in any one in claim 1-5, for starting material, to have for Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate Machine catalyzing by metal palladium coupling prepares the method that Laura replaces Buddhist nun, which is characterized in that synthetic route is as follows:
7. Organometallic Palladium catalytic coupling according to claim 6 prepares the method that Laura replaces Buddhist nun, which is characterized in that including Following steps:
The preparation of S1, compound 3:
Successively Weigh Compound 1, compound 2, potassium carbonate, organic metal palladium catalyst are added into reactor, add in reactor After entering organic solvent, it is passed through nitrogen into reaction system and drives air, reaction system is warming up to 70-80 DEG C, insulation reaction 4-5h Fully reacting, to complete, reaction system is cooled to room temperature for TLC detection reaction, and after separating water layer, reaction solution is concentrated under reduced pressure, and is obtained Compound 3;
The preparation of S2, compound 4:
After reactor is added in Weigh Compound 3, organic solvent, water, potassium hydroxide, reaction system stirring heating are added in reactor To 25-35 DEG C, insulation reaction 4-5h, fully reacting is recovered under reduced pressure solvent to doing, dilute hydrochloric acid solution is added into reactor, stirs Mixing reaction 35-40min, TLC detection reaction terminates, and continues to add hydrochloric acid tune reaction solution pH to 2.0-3.0, filter, filter cake drying, Obtain compound 4;
S3, Laura replace the preparation of Buddhist nun:
Compound 4, DMF, DIPEA are successively added into reactor, stirs, HATU is added into reactor in whipping process, Be warming up to 60~70 DEG C of reactions, after fully reacting, water quenching reaction is added in insulation reaction 4-5h, extracted, separate after obtain labor It draws and replaces Buddhist nun.
8. Organometallic Palladium catalytic coupling according to claim 7 prepares the method that Laura replaces Buddhist nun, which is characterized in that described The molar ratio of compound 1 and compound 2, potassium carbonate is 1:1.1:2, the additive amount of the organic metal palladium catalyst in step S1 It is the 7% of 1 mass of compound, the molar ratio of compound 3 and potassium hydroxide is 1:1.1 in the step S2, in the step S3 The molar ratio of compound 4 and DIPEA, HATU are 1:1.2:3.
9. Organometallic Palladium catalytic coupling according to claim 7 prepares the method that Laura replaces Buddhist nun, which is characterized in that described Organic metal palladium catalyst is Pd (Dppf)2Cl2Or Pd (Ph3P)4, the organic solvent is benzene, toluene, DMF, NMP, Isosorbide-5-Nitrae- Any solvent in dioxane.
CN201910079162.1A 2019-01-25 2019-01-25 A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun Pending CN109651418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910079162.1A CN109651418A (en) 2019-01-25 2019-01-25 A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910079162.1A CN109651418A (en) 2019-01-25 2019-01-25 A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun

Publications (1)

Publication Number Publication Date
CN109651418A true CN109651418A (en) 2019-04-19

Family

ID=66120821

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910079162.1A Pending CN109651418A (en) 2019-01-25 2019-01-25 A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun

Country Status (1)

Country Link
CN (1) CN109651418A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112457293A (en) * 2020-11-30 2021-03-09 商河探荣新技术开发中心 Application of TBTU in preparation of anti-cancer drugs
CN112824417A (en) * 2019-11-21 2021-05-21 上海天慈国际药业有限公司 Preparation method of Laolatinib

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104169286A (en) * 2012-03-06 2014-11-26 辉瑞大药厂 Macrocyclic derivatives for the treatment of proliferative diseases
CN109232607A (en) * 2018-09-20 2019-01-18 沈阳药科大学 Laura replaces the synthetic method of Buddhist nun

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104169286A (en) * 2012-03-06 2014-11-26 辉瑞大药厂 Macrocyclic derivatives for the treatment of proliferative diseases
CN109232607A (en) * 2018-09-20 2019-01-18 沈阳药科大学 Laura replaces the synthetic method of Buddhist nun

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BRYAN LI ET AL.,: ""Exploratory Process Development of Lorlatinib"", 《ORG. PROCESS RES. DEV》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112824417A (en) * 2019-11-21 2021-05-21 上海天慈国际药业有限公司 Preparation method of Laolatinib
CN112457293A (en) * 2020-11-30 2021-03-09 商河探荣新技术开发中心 Application of TBTU in preparation of anti-cancer drugs

Similar Documents

Publication Publication Date Title
KR100433023B1 (en) Manufacturing Method of Diaryl Carbonate
CN109651418A (en) A kind of method that Laura replaces Buddhist nun's bulk pharmaceutical chemicals synthetic intermediate and Organometallic Palladium catalytic coupling to prepare Laura for Buddhist nun
CN109651397A (en) A kind of Laura is for Buddhist nun's intermediate and prepares the method that Laura replaces Buddhist nun
CN102675393B (en) Method for preparing 19-demethyl-4-androstenedione
CN107098822A (en) A kind of preparation method for preparing the hydroxy acetophenone of 3 amino of Pranlukast key intermediate 2
CN108863754A (en) A kind of preparation method of acetylacetone cobalt (II)
CN111205216B (en) Method for preparing saxagliptin
CN109438237B (en) Preparation method of 3-ethoxy ethyl acrylate
CN109651398B (en) Bromide intermediate for synthesizing Laratinib and method for catalytically synthesizing Laratinib
CN107602354A (en) A kind of method of synthesizing propanediol butyl ether
CN105968103B (en) The synthetic method of anti-tumor drug Afatinib
CN113956293A (en) Propofol fumarate tenofovir impurity TA-Q5 salt and preparation method and application thereof
CN111620812B (en) Synthetic method of 2, 3-dichloropyridine
CN111100042B (en) Preparation method of 2-methoxy-5-sulfonamide benzoic acid
CN107674017A (en) The synthetic method of the piperidine alcohols of 1,2,2,6,6 pentamethyl of light stabilizer intermediate 4
CN102850270A (en) Method for preparing hydroxy substituted-3,4-dihydro-2(1H)-quinolinone compound by one-pot method
CN113004248A (en) Method for synthesizing carbazole compound by catalyzing hydrocarbon amination reaction with cobalt
CN113045572A (en) Preparation method of doxofylline impurity A
CN106632260B (en) A kind of preparation method of small molecule kinase inhibitors
CN114702372B (en) Method for preparing 4- (2-methoxyl) ethylphenol
CN114213323B (en) New process for synthesizing procaterol hydrochloride
CN112824417A (en) Preparation method of Laolatinib
CN110105371B (en) Impurities in doladazole bulk drug and preparation method thereof
CN114249703B (en) Preparation method of medical intermediate suitable for industrial amplification
CN113929685B (en) Preparation method of ibutenib intermediate

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190419

RJ01 Rejection of invention patent application after publication