Synthetic applications of the [2+2] cycloaddition products of ketene alkylsilylacetals with acrylonitrile
作者:Gérard Rousseau、Alain Quendo
DOI:10.1016/s0040-4020(01)88226-0
日期:1992.1
2-Cyanocyclobutane alkylsilylacetals, obtained by a [2+2] cycloaddition reaction of ketene alkylsilylacetals and acrylonitrile, have allowed the synthesis of 2-cyanoclobutanones, 4-chloro-4-cyanobutanoates and 4-cyanobutanoates by respectively acidic catalysis, FeCl3 cleavage and nBu4NF treatment. The cycloadducts obtained from chloroketene alkylsilylacetals give 2-cyanocyclopropanecarboxylates by