[EN] A PROCESS FOR THE PREPARATION OF NATEGLINIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE NATÉGLINIDE
申请人:CIPLA LTD
公开号:WO2011157986A1
公开(公告)日:2011-12-22
The present invention relates to a process for the preparation of substantially pure nateglinide of formula (I), substantially free from the cis-isomer and L-enantiomer and preparation of enantiomerically pure nateglinide form B, directly from the hydrolysis of a (-)-N-(trans-4-isopropylcyclohexyl-1-carbonyl)-D-phenylalanine alkyl ester in a ketonic solvent or water or mixture thereof.
[EN] SYNTHESIS AND PURIFICATION OF NATEGLINIDE<br/>[FR] SYNTHESE ET PURIFICATION DE NATEGLINIDE
申请人:GLENMARK PHARMACEUTICALS LTD
公开号:WO2004018408A1
公开(公告)日:2004-03-04
Disclosed is a method for the synthesis of [(trans-4-isopropyl cyclohexyl)-carbonyl] D-phenylalanine (nateglinide) (formula I) including the steps of (i) reacting trans-4-isopropyl cyclohexyl carboxylic acid (formula (5)) with an alkyl chloroformate (formula (13)) where R represents an alkyl group, in a ketonic solvent in the presence of a base at a temperature in the range of -20° to 30°C to form the mixed anhydride of formula (14); and (ii) reacting said mixed anhydride with an aqueous alkali salt solution of Dphenylalanine to yield a reaction mixture including [(trans-4-isopropyl cyclohexyl)carbonyl]-D-phenylalanine.
[EN] PROCESS FOR THE PREPARATION OF NATEGLINIDE<br/>[FR] PROCEDE DE FABRICATION DE NATEGLINIDE
申请人:CIPLA LTD
公开号:WO2005121071A1
公开(公告)日:2005-12-22
One-pot process for the preparation of nateglinide, which process comprises reacting an alkyl ester of D-phenylalanine of formula (II) where R represents C1-4 alkyl, typically methyl, either as the free base or in salt form (typically the hydrochloride), with trans-4-isopropylcyclohexanecarboxylic acid of formula (III) where X represents hydroxy or halo, typically chloro, to obtain a C1-4 alkyl ester of nateglinide of formula (IV), preferably the methyl ester of nateglinide followed by hydrolysis to yield nateglinide of formula (I).
[EN] A PROCESS FOR THE PREPARATION OF N-[[TRANS-4-(1-METHYLETHYL)CYCLOHEXYL]CARBONYL]-D-PHENYLALANINE<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE N-[[TRANS-4-(1-MÉTHYLÉTHYL)CYCLOHEXYL]CARBONYL]-D-PHÉNYLALANINE
申请人:NEULAND LAB LTD
公开号:WO2010106550A2
公开(公告)日:2010-09-23
The present invention is directed to an novel, industrially viable and cost effective process for preparation of substantially pure N-[[trans-4-(l-methylethyl) cyclohexyl] carbonyl]-D- phenylalanine commonly known as Nateglinide.
Novel form of n-(trans-4-isopropylcyclohexylcarbonyl)-d-phenylalanine
申请人:Rajamahendra Shanmughasamy
公开号:US20050165108A1
公开(公告)日:2005-07-28
The present invention relates to a novel crystalline form of N-(trans-4-isopropylcyclohexylcarbonyl)-D-phenylalanine and methods for preparing the same.