Effect of triarylphosphane ligands on the rhodium-catalyzed hydrosilylation of alkene
作者:Mei Xue、Jiayun Li、Jiajian Peng、Ying Bai、Guodong Zhang、Wenjun Xiao、Guoqiao Lai
DOI:10.1002/aoc.3092
日期:2014.2
functionalized triarylphosphaneligands are characterized by a very high catalytic effectiveness for the hydrosilylation of alkene. Among these catalysts tested, RhCl3/diphenyl(2‐(trimethylsilyl)phenyl)phosphane (8a) exhibited excellent catalytic properties. Using this silicon‐containing phosphane ligand for the rhodium‐catalyzed hydrosilylation of styrene, both higher conversion of alkene and higher β‐adduct
Efficient cross-metathesis of vinylsilanes, carrying a large spectrum of different substituents at silicon, with various olefins in the presence of the first and second generation Grubbs catalyst and Hoveyda–Grubbs catalyst is described. On the basis of the results of equimolar reactions of vinylsilanes with ruthenium alkylidene complexes and experiments with deuterium-labelled reagents, a general
activated N-heterocyclic carbene-Ni(0) as a catalyst and R3SiH as silane (IPrCl, syn- : anti-selectivity from up to 98 : 2 to 7 : 93 by Z = O, NH vs. NMs, R1 = n-pentyl). Heterocycles bearing homoallylsilane rather than vinylsilane was obtained chemoselectively. The undesired yet highly competitive reactivity was suppressed, like direct hydrosilylation of alkene and alkyne concurrently. Optionally, the
Conjugate Addition of Organosiloxanes to α,β-Unsaturated Carbonyl Compounds Catalyzed by a Cationic Rhodium Complex
作者:Shuichi Oi、Yoshio Honma、Yoshio Inoue
DOI:10.1021/ol025518h
日期:2002.2.1
[reaction: see text] A novel, additive-free, and clean conjugateaddition reaction of organosiloxanes to alpha,beta-unsaturated carbonylcompounds catalyzed by a cationic rhodium complex in water-containing solvent has been developed. A plausible reaction mechanism involving the additive-free transmetalation step between the rhodium complex and the silicon reagent is proposed.