Simplified preparations of trialkylsilyl- and bis(trialkylsilyl)dihalomethanes via the deprotonation of dihalomethanes

Article abstract of DOI:10.1016/S0022-328X(97)00275-1

Simple, high-yield routes to trialkylsilyl- and bis(trialkylsilyl)dihalomethanes are described. These compounds are prepared by the deprotonation of dibromomethane or dichloromethane by lithium diisopropylamide in the presence of a chlorosilane. The reactions are carried out at temperatures below - 70°C in THF/hexane solvent mixtures. After aqueous workup, the air- and water-stable products are isolated by either distillation or crystallization. Further reactions on these compounds are possible, as illustrated by one example.