Unprecedented effects of the trimethylsilyl group on the reactivity of 3C-silylated silacyclopentenes and their derivatives

We have synthesised new 3C-silylated silacyclopentenes from the corresponding 3-trimethylsilyl-1,1-dichloro-1-silacyclopent-3-enes. The presence of two metal centres M (M=Si) in α and β-positions confers an original structure for these new heterocycles. The chemical behaviour of such compounds and their derivatives was studied and compared to the results obtained in the non-substituted silacyclopentane series.