Highly Stereoselective and Efficient Hydrosilylation of Terminal Alkynes Catalyzed by

With [RuCl(2)(p-cymene)](2) as a catalyst, extremely high regio- and stereoselectivity was observed in the hydrosilylation reaction of various terminal alkynes under mild conditions to afford beta-(Z)-vinylsilanes in excellent yields. A dramatic directing effect was also observed when alkynes having a hydroxyl group at the beta position to the triple bond were employed as a substrate, and in these cases regioisomeric alpha-vinylsilanes were generated with excellent selectivity.