Metal iodide mediated ring expansion of cyclopropanecarboxylic thioesters with imines
作者:Wenwei Huang、Janice Chin、Luke Karpinski、Gary Gustafson、Carmen M. Baldino、Libing Yu
DOI:10.1016/j.tetlet.2006.05.019
日期:2006.7
Metal iodide mediated three-component reactions of cyclopropanecarboxylic thioesters 1, aldehydes, and amines were developed. The initial products, pyrrolidines 2 were obtained in 39–73% yields, which could further be converted to lactams 4, via sequential reactions of a retro-aza-Michael addition and an intramolecular cyclization. This methodology provided facile access to analogs of both pyrrolidines