Combining two-directional synthesis and tandem reactions: new access to 3,5-disubstituted pyrrolizidines and first total synthesis of alkaloid cis-223B
作者:Jean-Chistophe Legeay、William Lewis、Robert A. Stockman
DOI:10.1039/b900451c
日期:——
Two new tandem reactions for the synthesis of 3,5-disubstituted pyrrolizidines and the first total synthesis of alkaloidcis-223B (in 7 steps and 43% overall yield), involving a double cross metathesis and double Michael addition as key steps, are presented.
提出了两种新的串联反应用于合成3,5-二取代吡咯烷并且首次实现了生物碱cis-223B的全合成(经历7步,总体产率为43%),其中包含双交叉烯烃复分解和双迈克尔加成作为关键步骤。