Asymmetric Syntheses of Fused Bicyclic Compounds by Conjugate Additions of Allylic Organolithium Species to Activated Olefins and Subsequent Cyclizations
作者:Sung H. Lim、Michael D. Curtis、Peter Beak
DOI:10.1021/ol007012+
日期:2001.3.1
[reaction: see text]. Addition of the configurationally stable organolithium species produced by enantioselective deprotonation of N-Boc-N-(p-methoxyphenyl) allylamines to alpha,beta-unsaturated carbonyl compounds affords 1,4-addition products in good yields with high diastereomeric and enantiomeric ratios. Further transformations of these compounds provide [3.3.0]-, [4.3.0]-, [5.3.0]-, and [5.4.0]-carbocycles