作者:Toshio Shimizu、Michio Kobayashi
DOI:10.1246/cl.1986.161
日期:1986.2.5
Fractional recrystallization of diastereomeric 2,4,6-triisopropylpheny1 4′-(l-menthyloxycarbonyl)phenyl selenoxide gave optically pure (−)-selenoxide. Transesterification of this diastereomerically pure (−)-selenoxide with methanol gave enantiomeric (−)-2,4,6-triisopropylphenyl 4-′-(methoxycarbonyl)phenyl selenoxide in 88.1% optical purity.
将非对映的 2,4,6-三异丙基苯基 1 4′-(l-薄荷氧羰基)苯基硒氧化物进行分馏重结晶,得到光学纯度为 (-)-selenoxide 。用甲醇对这种非对映异构体进行酯交换反应,得到光学纯度为 88.1%的(-)-2,4,6-三异丙基苯基 4-′-(甲氧基羰基)苯基硒氧化物对映体。