DIORGANOSILACYCLOPENT-3-ENE DERIVATIVES FROM DIORGANODICHLOROSILANES AND BUTADIENEMAGNESIUM: EVIDENCE FOR CROTYL-GRIGNARD INTERMEDIATES

Article abstract of DOI:10.1016/0022-328X(85)88025-6

Reactions of substituted dichlorosilanes, R¹R²SiCl2 (R¹=CH3, R²=Ph, vinyl), with butadienemagnesium yield methoxybutenylsilane derivatives and silacyclopent-3-enes after treatment with methanol at -70 deg C.For R=vinyl, a substituted cyclodeca-3,8-diene is formed in addition to the 1,4-disilylated butenylic species.The nature of the range of products suggests that silyl-substituted crotyl-Grignard compounds are the major intermediates.