A novel cyclopentane annulation by [3+2] cycloaddition of substituted methylenecyclopropyl ketones with allyltrimethylsilane
作者:Honoré Monti、Denis Rizzotto、Gilbert Léandri、Jean-Pierre Monti
DOI:10.1016/s0040-4039(00)76650-0
日期:1994.5
Reaction of subtituted methylenecyclopropyl ketones with allyltrimethylsilane affords functionalized methylene or alkylidenecyclopentanes in good yield via a TiCl4 mediated cleavage of the carbocycle followed by a [3+2] cycloaddition of the resultant 1,3-zwitterion with allyltrimethylsilane which acts as the 1,2-partner.