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.