Transposition sigmatropique de cetones α-cyclopropeniques en milieu acide
作者:Maurice Vincens、Claude Dumont、Michel Vidal
DOI:10.1016/s0040-4039(00)84505-0
日期:——
In proticmedia 1-acyl 2-cyclopropene derivatives undergo a highly selective ring expansion reaction leading to cyclobutenes. This homoallylic 1-(2-cyclopropenyl) 1-hydroxy- ethylium cationrearrangement is an excellent approach to difunctional cyclobutene derivatives.