[EN] A PROCESS FOR PREPARING (R)-4-CYANO-3-HYDROXYBUTYRIC ACID ESTER<br/>[FR] PROCEDE DE PREPARATION DE DERIVES D'ESTER D'ACIDE (R)-4-CYANO-3-HYDROXYBUTYRIQUE
申请人:SAMSUNG FINE CHEMICALS CO LTD
公开号:WO2000046186A1
公开(公告)日:2000-08-10
The present invention relates to a process for preparing (R)-4-cyano-3-hydroxybutyric acid ester derivatives and more particularly, to a process for preparing optically pure (R)-4-cyano-3-hydroxybutyric acid ester derivatives expressed by formula (1) in high yield by performing cyanation and sequential esterification of (S)-3,4-epoxybutyric acid salt as a starting material. In said formula, R represents linear or branched alkyl group with 1∩5 carbon atoms or benzyl group.