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
Markovnikov Hydrosilylation of Alkynes with Tertiary Silanes Catalyzed by Dinuclear Cobalt Carbonyl Complexes with NHC Ligation
作者:Dongyang Wang、Yuhang Lai、Peng Wang、Xuebing Leng、Jie Xiao、Liang Deng
DOI:10.1021/jacs.1c06583
日期:2021.8.18
with PhC≡CH and HSiEt3 can furnish the dinuclear cobalt alkyne and mononuclear cobalt silyl complexes [(IPr)(CO)2Co(μ–η2:η2-HCCPh)Co(CO)3], [(IPr)(CO)2Co(μ-η2:η2-HCCPh)Co(CO)2(IPr)], and [(IPr)Co(CO)3(SiEt3)], respectively. Both dicobalt bridging alkyne complexes can react with HSiEt3 to yield α-triethylsilyl styrene and effect the catalytic Markovnikov hydrosilylation reaction. However, the mono(NHC)