[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.
Iridium and bis(4-nitrophenyl)phosphoric acid catalysed amination of diol by hydrogen-borrowing methodology for the synthesis of cyclic amine: Synthesis of clopidogrel
The borrowing hydrogen method is an environmentally benign process for the synthesis of amines, as H2O is the side product. A new green process for the amination of diol by [Ir] catalyst 15 and bis(4-nitrophenyl)phosphoric acid for the synthesis of cyclic amine is reported. This method was successfully applied for the synthesis of antiplatelet drug clopidogrel.
A process for preparing clopidogrel or a salt thereof.
制备氯吡格雷或其盐的方法。
[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF CLOPIDOGREL BISULFATE<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION DE BISULFATE DE CLOPIDOGREL
申请人:ORCHID CHEMICALS & PHARM LTD
公开号:WO2011012961A1
公开(公告)日:2011-02-03
The present invention provides an improved process for the preparation of Clopidogrel of Formula (I) or its pharmaceutically acceptable salts, and its intermediate of Formula (II). Formula (I) Formula (II).
[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