Dichloro(ethylenediamine)platinum(II), a water-soluble analog of the antitumor cisplatin, as a heterogeneous catalyst for a stereoselective hydrosilylation of alkynes under neat conditions
hydrosilylation of internal and terminal alkynesunder heterogeneous catalysis by dichloro(ethylenediamine)platinum(II) is discussed. This commercially available platinum complex operates under neat conditions at 90 °C, producing exclusively the (trans) Z-isomer with symmetrical internal alkynes, while terminal alkynes produce a mixture of α- and β(E)-hydrosilylated products. No β(Z)-hydrosilylated product was
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)
1H, 13C and 29Si NMR study of α- and β-silylstyrenes and their adducts with dichlorocarbene
作者:E. Liepiņs̆、Yu. Goldberg、I. Iovel、E. Lukevics
DOI:10.1016/s0022-328x(00)99405-1
日期:1987.12
1H, 13C and 29Si NMR spectra for the α- and β-silylstyrenes (E)-PhCHCHSiR3 (I) and PhC(SiR3)CH2 (II) (R = Cl, Me, Ph), and those for some dichlorocarbene adducts of I and II (R = Me, Ph), were examined. From the 13C NMR data, the phenyl substituent in the molecules I and II enhances the electronic effects of the organosilicon substituent at Cα, and weakens these effects on the Cα resonance. The degree
Gold-Film-Catalysed Hydrosilylation of Alkynes by Microwave-Assisted, Continuous-Flow Organic Synthesis (MACOS)
作者:Gjergji Shore、Michael G. Organ
DOI:10.1002/chem.200801610
日期:2008.10.29
Thin gold films on the surface of glass capillaries have proven to be highly active catalysts for the rapid hydrosilylation of alkynes that are flowed through the reactor while being heated by microwave irradiation. The films are able to be reused at least five times with no loss of activity and with no detectable levels of gold showing up in the hydrosilylated products.
Efficient Pd(0)-Catalyzed Hydrosilylation of Alkynes with Triorganosilanes
作者:Koichiro Oshima、Dai Motoda、Hiroshi Shinokubo
DOI:10.1055/s-2002-33535
日期:——
An electron-rich Pd(0) complex, a Pd 2 (dba) 3 .CHCl 3 -tri-cyclohexylphosphine combination catalyzes highly efficient hydrosilylation of alkynes at room temperature with Ph 3 SiH or Ph 2 MeSiH without solvents. The regioselectivity of this process is higher than that with the conventional Pt(0)-catalyzed hydrosilylation.