专利检索 ap:("SAMSUNG FINE CHEMICALS CO LTD") AND inv:"LEE WON JANG" 第 1 页

1.

发明公开
A PROCESS FOR PREPARING (R)-4-CYANO-3-HYDROXYBUTYRIC ACID ESTER 审中-公开
标题翻译：用于制备方法（R）-4-氰基-3-羟基丁酸

公开(公告)号：EP1149068A4

公开(公告)日：2003-01-02

申请号：EP00902170

申请日：2000-01-24

申请人： SAMSUNG FINE CHEMICALS CO LTD

发明人： ROH KYOUNG ROK , YU HO SUNG , KIM KYUNG IL , LEE WON JANG , HWANG DAE IL

IPC分类号： C07C253/30 , C07B53/00 , C07C253/00 , C07C255/20 , C07C253/16

CPC分类号： C07C253/00 , C07B2200/07 , C07C255/20

摘要： 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.