Synthesis of indolizidines (−)-195B, (−)-223AB and (−)-239AB: (2S,5R)-1-[(benzyloxy)carbonyl]-2-methoxycarbonyl-5-(4-pentenyl)pyrrolidine as a versatile chiral building block
作者:Catherine Célimène、Hamid Dhimane、Gérard Lhommet
DOI:10.1016/s0040-4020(98)00498-0
日期:1998.8
indolizidines, (−)-195B, (−)-223AB and (−)-239AB are described. The employed strategy is based on the utilization of the common enantiopure trans 2,5-disubstituted pyrrolidine 3, which is assembled by addition of pent-4-enylcopper to N-acyl iminium ion derived from (S)-proline.
描述了三个左旋gyrgyre 3,5-二取代的吲哚唑烷的总合成,(-)-195B,(-)-223AB和(-)-239AB。所采用的策略是基于利用对映体纯的反式2,5-二取代的吡咯烷3,该对映体是通过向(S)-脯氨酸衍生的N-酰基亚胺离子中加入戊-4-基铜而组装而成的。