Radical transfer hydrosilylation/cyclization using silylated cyclohexadienes

[GRAPHICS] A new method for mild metal free hydrosilylation is described, Silylated cyclohexadienes are used as radical transfer hydrosilylating reagents for various double and triple bonds, A trialkylsilane is transferred from a cyclohexadiene moiety to an alkene. The hydrosilylation can be combined with a C-C bond formation as shown for the preparation of silylated cycloalkanes from the corresponding dienes.