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。