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
通过乙烯酮烷基甲硅烷基乙缩醛和丙烯腈的[2 + 2]环加成反应获得的2-氰基环丁烷烷基甲硅烷基缩醛可以分别通过酸性催化,FeCl 3裂解和二价合成2-氰基丁烷酮,4-氯-4-氰基丁酸酯和4-氰基丁酸酯。nBu 4 NF处理。由氯乙烯烯烷基甲硅烷基缩醛得到的环加合物通过与nBu 4 NF反应而得到2-氰基环丙烷羧酸酯。