Seven chiral target molecules containing a hydroxy group have been resolved by both biocatalytic and chemical means. The lipase-catalyzed acylation mainly yielded the acylated derivative of the (R)-alcohols with moderate enantiomeric excess and the enantiopure (S)-alcohols. In the course of the chemical resolution, first the dicarboxylic acid monoesters of the target molecules were synthesized and the resolution of these monoesters was attempted by different homochiral bases. By re-resolution and/or optimization of the reaction time and/or recrystallization, respectively, each molecule was produced in very high enantiomeric purity. (c) 2006 Elsevier Ltd. All rights reserved.
[EN] PHARMACEUTICAL INTERMEDIATES AND A PROCESS FOR THE PREPARATION THEREOF<br/>[FR] INTERMEDIAIRES PHARMACEUTIQUES ET PROCEDE DE PREPARATION DE CEUX-CI
申请人:EGYT GYOGYSZERVEGYESZETI GYAR
公开号:WO2006013399A1
公开(公告)日:2006-02-09
The invention relates to pure enantiomer and in certain cases new racemic-isopropanol derivatives of the general Formula (I) and a process for the preparation thereof. The partly new and partly known compounds of the general Formula (I) are useful pharmaceutical intermediates. The substituent definition of symbols R1, R2 and R3 are as stated in the patent specification.