[EN] PROCESS FOR PREPARING (R)-3,4-EPOXY-1-BUTANOL<br/>[FR] PROCEDE DE PREPARATION DE (R)-3,4-EPOXY-1-BUTANOL
申请人:SAMSUNG FINE CHEMICALS CO LTD
公开号:WO2003097624A1
公开(公告)日:2003-11-27
The present invention relates to a novel process for preparing (R)-3,4-epoxy-1-butanol in particular, a process for preparing (R)-3,4-epoxy-1-butanol with relatively high yield and in a cost-effective manner, wherein (S)-3-alkyl or arylsulfonyloxy-butyrolactone used as a starting material is reduced under a mild condition to give 2-alkyl or arylsulfonyloxy-1,4-butanediol as an intermediate, and the intermediate is then epoxidized in the presence of a base to invert a chiral center.
ASYMMETRIC MICHAEL ADDITION OF THIOPHENOL TO MALEIC ACID ESTERS
作者:Hiroyuki Yamashita、Teruaki Mukaiyama
DOI:10.1246/cl.1985.363
日期:1985.3.5
(S)-(−)-Diisopropyl phenylthiosuccinate (81% optical purity) is prepared in 95% yield by the asymmetric Michael addition of thiophenol to diisopropyl maleate in the presence of a catalytic amount of cinchonine. The succinate thus prepared is transformed into (R)-(+)-3,4-epoxy-1-butanol without racemization.