A Catalytic Method for the Preparation of Polysubstituted Cyclopentanes: [3+2] Cycloaddition of Vinylidenecyclopropanes with Activated Olefins Catalyzed by Triflic Imide
作者:Wei Li、Min Shi
DOI:10.1021/jo802294s
日期:2009.1.16
[3+2] Cycloadditions of vinylidenecyclopropanes (VDCPs) with electron-deficient olefins, such as methyl vinyl ketone (MVK) and acrylaldehyde, proceed smoothly in the presence of a catalytic amount of triflic imide (Tf2NH) to give the corresponding functionalized cyclopentanes in good to high yields.
[3 + 2]亚乙烯基环丙烷(VDCPs)与缺电子烯烃如甲基乙烯基酮(MVK)和丙烯醛的环加成反应在催化量的三氟甲基酰亚胺(Tf 2 NH)的存在下平稳进行,得到相应的官能团环戊烷的收率高到高。