Catalytic activity of bis(dialkylamino)carbenium salts in hydrosilylation reactions
作者:E. A. Chernyshev、Z. V. Belyakova、V. D. Sheludyakov、V. M. Shevchenko
DOI:10.1007/bf02496134
日期:1997.5
Bis(dialkylamino)carbenium salts [(Me2N)2CCl]+}2MCl42− (M=Ni, Pd) and [Me2NC(X)NR2]+}2PtCl62− (R=Me, All; X=H, Cl, Me) are efficient catalysts for hydrosilylation of allyl phenyl ether, triallylamine, allyl chloride, allylamine, and 1-octene with various hydrosilanes. The catalytic activity is dependent on the salt composition and the nature of the metal M, the saturated compound, and the hydrosilane
The present invention discloses a method for synthesizing a reversibly protected organometallic compound which comprises (1) reacting an organometallic compound with a hydroxyl group containing compound to produce a solution containing the reversibly protected organometallic compound and hydrogen chloride; (2) reacting the solution containing the reversibly protected organometallic compound and the hydrogen chloride with a trialkyl amine to precipitate the hydrogen chloride from the solution; and (3) recovering the reversibly protected organometallic compound from the solution of the reversibly protected organometallic compound.
Effect of catalysts on the reaction of allyl esters with hydrosilanes
作者:Z. V. Belyakova、M. G. Pomerantseva、L. A. Efimova、E. A. Chernyshev、P. A. Storozhenko
DOI:10.1134/s1070363210040079
日期:2010.4
The reaction of hydrosilylation of allyl esters XOCH(2)CH=CH(2) (X = MeCO, CF(3)CO, C(3)F(7)CO) and PhOCH(2)CH=CH(2) with hydrosilanes HSiY(3) (Y = Cl, OEt) in the presence of the Speier catalyst, the Speier catalyst with additives, and of various nickel complexes was studied. The catalytic hydrosilylation reaction in the presence of the Speier catalyst is accompanied by the reduction. Additives to the Speier catalyst (vinyltriethoxysilane and some ethers) allow to suppress considerably the reduction reaction. In the presence of the studied nickel complexes mainly reduction and isomerization reactions occurred. The best nickel catalysts of hydrosilylation were the mixtures of NiCl(2) or Ni(acac)(2) with phosphine oxides. In contrast to allyl esters, the hydrosilylation of simple olefins proceeds easier, the content of the product of hydrosilylation in the reaction mixture reaches 94.3%.