Hydrosilylation, hydrostannation, carbosilylation, and carbostannation of unactivated alkynes with organosilanes, or organostannanes proceed effectively in the presence of catalytic amounts of Lewis acids to produce the corresponding vinylsilyl or vinylstannyl compounds in a highly regio-and stereoselective way. Although it is well known that transition metal catalyzed hydrometalations and carbometalations, in general, proceed in ...
