Silastannation, acetylene, palladium

Recently, Hada et al. [74] have reported a theoretical study on the reaction mechanism and regioselectivity of silastannation of acethylene with a palladium catalyst. Experimentally, terminal acetylenes react with silylstan-nanes to give highly regio- and stereoselective l-silyl-2-stannylalkenes with tetrakis(triphenylphosphine)palladium as a catalyst [75]. The products are always cis adducts tin adds to the internal position as follows ... 

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