Photoactivated hydrosilylation reaction of alkynes
作者:Fei Wang、Douglas C. Neckers
DOI:10.1016/s0022-328x(02)02042-9
日期:2003.1
The photoactivated (350 nm) hydrosilylation of alkynes by silanes catalyzed by platinum(II) bis(acetylacetonato) has been studied. Platinum(II) bis(acetylacetonato) is an efficient catalyst. High yields of adducts (>98% for terminal alkynes) can be obtained in 2–3 h after a short induction period with a catalyst–reactant molar ratio of 10−3/1. The reaction rate depends on the choice of silane, irradiation
Rhodium(I)-mono- und -diazadienkomplexe, synthese, spektroskopische charakterisierung, oxidative additionsreaktionen und einsatz in der homogenen katalyse zur hydrosilylierung
作者:Monika Brockmann、Heindirk tom Dieck、Jürgen Klaus
DOI:10.1016/0022-328x(86)80012-2
日期:1986.2
Hydrosilylation of alkynes catalyzed by platinum on carbon
作者:Moni Chauhan、Brian Jay Hauck、Lindsay P Keller、Philip Boudjouk
DOI:10.1016/s0022-328x(01)01103-2
日期:2002.2
Hydrosilylation of terminal and internal alkynes with chlorosilanes, alkylsilanes, and alkoxysilanes catalyzed by platinum on carbon are discussed. The yields of the isolated vinylsilanes are high and the selectivity of the product depends on the silane used. Hydrosilylation of alkynes with chlorosilanes produced the beta-trans vinylsilanes, while alkyl and alkoxysilanes produced two or three vinylsilane isomers. The selectivity of the catalyst platinum on carbon is similar to Karstedt's catalyst in the reaction of phenylacetylene with triethylsilane or triethoxysilane. High resolution electron microscopy showed colloidal platinum to be present in these reactions. (C) 2002 Published by Elsevier Science B.V.
Cross-metathesis of vinylsilanes with olefins in the presence of Grubbs’ catalyst
Effective cross-metathesis of H2C-C(H)SIR3, where SiR3 = Si(OMe)(3), Si(OEt)(3), Si(OSiMe3)(3), with selected olefins in the presence of (PCy3),Cl2Ru(-CHPh) (I) is described. Treatment of p-substituted styrenes, l-alkenes and selected allyl derivatives H2C-CHCH2R' (R' = SiMe3, Si(OEt)(3), Ph, OPh) with an excess of H2C-C(H)SiR3 results in the formation of the respective cross-metathesis products with good yields and selectivities. The metallacarbene mechanism of the process is discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.