Reaction of hydrosilanes with alkynes catalyzed by gold nanoparticles supported on TiO2
作者:Androniki Psyllaki、Ioannis N. Lykakis、Manolis Stratakis
DOI:10.1016/j.tet.2012.08.021
日期:2012.10
Gold nanoparticles supported on TiO2 (0.8–1.4 mol %) catalyze the β-(E) regioselective hydrosilylation of a variety of functionalized terminal alkynes with alkylhydrosilanes in 1,2-dichloroethane (70 °C). The product yields are excellent, and the reaction times relatively short, while almost equimolar amounts of alkynes and hydrosilanes can be used. Minor side-products in up to 35% relative yield of
Silylzincation of carbon–carbon multiple bonds revisited
作者:Gertrud Auer、Martin Oestreich
DOI:10.1039/b513528a
日期:——
The first investigation of the copper-catalyzed silylzincation of alkynes as well as a diene and styrene using bis(triorganosilyl) zinc reagents led to the development of an efficient procedure and the disclosure of an unexpected bissilylation and unforeseen regioselectivity.
The reaction of phenylacetylene, tolane, or isoprene with cis-bis(dimethylphenylsilyl)bis(methyldiphenylphosphine)platinum readily took place to result in 1,2- or 1,4- doublesilylation, respectively. Ethylene also underwent doublesilylation with the platinumcomplex, but styrene selectively gave E-2-(dimethylphenylsilyl)styrene.