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
开发了金属碘化物介导的环丙烷羧酸硫酯1,醛和胺的三组分反应。最初的产物吡咯烷2以39-73%的产率获得,可通过逆向aza-Michael加成反应和分子内环化的顺序反应进一步转化为内酰胺4。这种方法提供了容易获得吡咯烷2和内酰胺4的类似物。