Reaction of Ketene Silyl Acetals with Unsaturated Nitrites in the Presence of Titanium Tetrachloride
作者:Syed Masarrat Ali、Gérard Rousseau
DOI:10.1016/s0040-4020(01)87886-8
日期:1990.1
The reaction of ketene alkyl silyl acetals with acrylonitrile in the presence of titaniumtetrachloride in dichloromethane at -80°C leads to coupled compounds. Formation of these products can be explained by the transformation of ketene acetals into enoxy radicals trapping of these radicals by acrylonitrile and then dimerization. With bisketene acetals derived from glutarate and pimelate a ring closure
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