Synthesis of (−)-Sedinine by Allene Cyclization and Iminium Ion Chemistry
作者:Roderick W. Bates、Yongna Lu
DOI:10.1021/ol1016492
日期:2010.9.3
A synthesis of the sedum alkaloid sedinine has been achieved employing silver(I)-catalyzed allenic hydroxylamine cyclization and ring-closing metathesis to form a bicyclic N,O-acetal. Ring opening of this acetal with a silylenolether under Lewis acidic conditions is exclusively trans selective, leading to the natural product after reduction. On the other hand, conversion of the bicyclic N,O-acetal