Concise Synthesis of (±)-Clopidogrel via Carboxylation of Benzylamine with CO2
摘要:
A concise and efficient synthesis of (+/-)-clopidogrel, an antithrombotic agent, is achieved by inserting CO2 at the benzylic position as the key reaction without using any toxic transition metals. The overall yield of the synthetic process is 38% and the salient features include operationally simple process chemistry and fewer steps.
[EN] METHOD OF CONVERTING ALCOHOL TO HALIDE<br/>[FR] PROCÉDÉ DE CONVERSION D'UN ALCOOL EN HALOGÉNURE
申请人:UNIV SAARLAND
公开号:WO2016202894A1
公开(公告)日:2016-12-22
The present invention relates to a method of converting an alcohol into a corresponding halide. This method comprises reacting the alcohol with an optionally substituted aromatic carboxylic acid halide in presence of an N-substituted formamide to replace a hydroxyl group of the alcohol by a halogen atom. The present invention also relates to a method of converting an alcohol into a corresponding substitution product. The second method comprises: (a) performing the method of the invention of converting an alcohol into the corresponding halide; and (b) reacting the corresponding halide with a nucleophile to convert the halide into the nucleophilic substitution product.
[EN] IMPROVED PROCESS FOR PREPARATION OF CLOPIODOGREL BISULFATE CRYSTALLINE FORM-1<br/>[FR] PROCEDE AMELIORE DE PREPARATION DE LA FORME CRISTALLINE 1 DU BISULFATE DE CLOPIDROGEL
申请人:PHARMAZELL GMBH
公开号:WO2011055378A1
公开(公告)日:2011-05-12
An improved process for preparing crystalline form-1 of (S)-methyl 2-(2-chlorophenyl)-2-6, 7-dihydrothieno[3, 2-c] pyridine-5(4H)-yl}acetate bisulfate (clopidogrel bisulfate) of formula I is provided The preparation comprises the straight conversion of an uncyclized material of (S)-methyl 2-[2- (thiophen-2-yl)ethylamino]-2-(2-chlorophenyl)acetate hydrochloride into clopidogrel bisulfate crystalline form-1 without any degradation of clopidogrel base
Stereoselective Method for the Production of Clopidogrel
申请人:Stohandl Jiri
公开号:US20070219166A1
公开(公告)日:2007-09-20
The present invention relates to processes for preparing a compound of the general formula (Ia)
wherein X is a halogen atom, or a pharmaceutically acceptable salt thereof, wherein a compound of the formula (II)
wherein X is as defined above and Y and Z independently represent a leaving group each, is reacted with an optically active amino alcohol to form a first mixture of diastereomers.
PROCESS FOR PREPARATION OF CLOPIDOGREL BISULPHATE FORM-1
申请人:ALLA Venkat Reddy
公开号:US20070191609A1
公开(公告)日:2007-08-16
Disclosed herein is a cost effective and industrially feasible process for the preparation of (+) Clopidogrel bisulphate. The present invention further discloses a novel method of precipitation of (+) Clopidogrel bisulphate Form I directly from solvent mix of methanol and acetone in presence of sulfuric acid at a temperature of 25-40° C.