3,4-Annulated Indoles via Tandem Cyclopropane Ring-Opening/Conia-ene and Michael Addition/Conia-ene Reactions
作者:Shane R. Cochrane、Michael A. Kerr
DOI:10.1021/acs.orglett.2c01810
日期:2022.8.5
4-Alkynyl indoles, when treated with a benzylidene malonate or a donor–acceptor cyclopropane in the presence of a zinc halide, furnished 3,4-hexannylated or 3,4-heptannulated products, respectively, in fair to excellent yields. The reaction proceeds via a tandem addition/Conia-ene cyclization.
4-炔基吲哚,当在卤化锌存在下用亚苄基丙二酸酯或供体-受体环丙烷处理时,分别提供 3,4-己基化或 3,4-庚环化产物,产率相当高。该反应通过串联加成/Conia-ene环化进行。