New synthesis of all the four isomers of 2-(2-hydroxypropyl)pyrrolidines via iterative asymmetric dihydroxylation to cause enantiomeric enhancement
作者:Hiroki Takahata、Minoru Kubota、Takefumi Momose
DOI:10.1016/s0957-4166(97)00348-0
日期:1997.8
Both enantiomers of 2-(2-propenyl)pyrrolidine 7 (75–84% ee), prepared via the asymmetricdihydroxylation (AD) of terminal olefin 5, underwent the second AD to provide all of the four stereoisomeric 2-(2-hydroxypropyl)pyrrolidines 8 with enantiomeric enhancement (>98% ee). An asymmetricsynthesis, starting from 8, of several 2-(2-hydroxypropyl)pyrrolidine alkaloids is demonstrated.