ASYMMETRIC MICHAEL ADDITION OF THIOPHENOL TO MALEIC ACID ESTERS
(S)-(-)-Diisopropyl phenylthiosuccinate (81percent optical purity) is prepared in 95percent 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.
Yamashita, Hiroyuki,Mukaiyama, Teruaki
p. 363 - 366
(2007/10/02)
Chemical structure of ascarylose.
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FOUQUEY,POLONSKY,LEDERER
p. 315 - 325
(2007/10/12)
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