Journal of Organometallic Chemistry p. 275 - 280 (1989)
Update date:2022-09-26
Topics: Catalysts Solvent applications Reaction Conditions Reaction Components Reaction Mechanism Substrate Scope
Skoda-Foeldes, Rita
Kollar, Laszlo
Heil, Balint
Hydrosilylation of vinyl- and vinylidene-type olefins (styrene (1a), 2-phenyl-propene (1b), methyl methacrylate (6)) has been carried out with either PtCl2 (dissolved in the substrate) or a platinum-phosphine catalyst prepared in situ.The activity and regioselectivity of the platinum-phosphine catalysts depend strongly on the phosphine structure and the metal/ligand ratio.Complexes involving chelating phosphines are inactive.Although mainly linear regioisomers are formed (2 and 7 respectively) in the reaction of 6, some 1,4-addition of the silane to the conjugated system also takes place to give a silyl ketene acetal derivative (8).A marked decrease in the reaction rate is observed if Ph3SiH instead of Et3SiH is used as the hydrosilylating agent.
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