[EN] INDUSTRIAL PROCESS FOR THE SYNTHESIS OF (S)-(+)-PREGABALIN<br/>[FR] PROCÉDÉ INDUSTRIEL DE SYNTHÈSE DE (S)-(+)-PRÉGABALINE
申请人:RICHTER GEDEON NYRT
公开号:WO2011124934A1
公开(公告)日:2011-10-13
Process for the preparation of (S)-(+)-pregabalin (1) that racemic pregabalin (2) was solved in water, reacted with a chiral a-hydroxy-carboxylic acid or a mixture of chiral α-hydroxy-carboxylic acids in desired case in the presence of an achiral acid, (S)-(+)-pregabalin (1) was deliberated from the obtained diastereomer salt and in desired case the residue of racemic pregabalin (2) was regenerated.
In this study, (S)-phenylalanine, aspartame and (S)-pregabalin, which contain alpha-, beta- and gamma-amino acidic moieties were successfully applied as resolving agents for the enantiomeric separation of mandelic acid via the formation of diastereomeric salts. The resolution of mandelic acid was also attempted with mixtures of the corresponding resolving agents and a more efficient enantiomeric separation of the mandelic acid was observed compared with the given sole resolving agents in a few instances. The best results were obtained with a mixture of (S)-phenylalanine and (S)-alanine; the latter resolving agent was insufficient when it was applied alone. The resolution efficiency of mandelic acid could also be improved by applying structurally related amphoteric achiral additives along with the corresponding resolving agents. (C) 2015 Published by Elsevier Ltd.
WO2009/1372
申请人:——
公开号:——
公开(公告)日:——
[EN] PROCESS FOR PREPARING (S)-3-(AMINOMETHYL)-5-METHYLHEXANOIC ACID<br/>[FR] PROCÉDÉ DE FABRICATION D'ACIDE (S)-3-(AMINOMÉTHYL)-5-MÉTHYLHEXANOÏQUE
申请人:MATRIX LAB LTD
公开号:WO2009125427A3
公开(公告)日:2010-06-03
[EN] NOVEL METHOD FOR THE PREPARATION OF (S)-PREGABALIN<br/>[FR] NOUVEAU PROCÉDÉ POUR LA PRÉPARATION DE LA (S)-PRÉGABALINE