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)
User-Friendly Platinum Catalysts for the Highly Stereoselective Hydrosilylation of Alkynes and Alkenes
作者:Steve Dierick、Emilie Vercruysse、Guillaume Berthon-Gelloz、István E. Markó
DOI:10.1002/chem.201502643
日期:2015.11.16
With a view to addressing the shortcomings of traditional catalysts, a new generation of outstanding N‐ heterocyclic carbene platinum(0) complexes for the hydrosilylation of unsaturated carbon–carbon bonds is reported. Their discovery and application to the stereoselective addition of various silanes to silylated alkynes, terminalacetylenes, and olefins is presented. Insights into the catalytic cycle
Iridium-Catalyzed, Diastereoselective Dehydrogenative Silylation of Terminal Alkenes with (TMSO)<sub>2</sub>MeSiH
作者:Chen Cheng、Eric M. Simmons、John F. Hartwig
DOI:10.1002/anie.201304084
日期:2013.8.19
achieved under mild conditions with low catalyst loading. The diastereoselectivity of the reaction can be controlled by choosing the appropriate ancillary ligand (see scheme; coe=cyclooctene). The silylation products undergo further transformation such as oxidation or cross‐coupling.
Palladium-Catalyzed Cyclopropanation of Alkenyl Silanes by Diazoalkanes: Evidence for a Pd<sup>0</sup>Mechanism
作者:Guillaume Berthon-Gelloz、Mélanie Marchant、Bernd F. Straub、Istvan E. Marko
DOI:10.1002/chem.200802052
日期:2009.3.9
Pd0 does the trick! Alkenylsilanes are efficiently cyclopropanated by diazoalkanes at low Pd loadings (see scheme). Clear evidence for the involvement of a Pd0 resting state for this reaction is given.
Highly β-(<i>E</i>)-Selective Hydrosilylation of Terminal and Internal Alkynes Catalyzed by a (IPr)Pt(diene) Complex
作者:Guillaume Berthon-Gelloz、Jean-Marc Schumers、Guillaume De Bo、István E. Markó
DOI:10.1021/jo800411e
日期:2008.6.1
The regioselectivehydrosilylation of terminal and internalalkynes catalyzed by the novel (IPr)Pt(AE) (7) (IPr = bis(2,6-diisopropylphenyl)imidazo-2-ylidene, AE = allyl ether) complex is presented. The (IPr)Pt(AE) catalyst displays enhanced activity and regioselectivity for the hydrosilylation of terminal and internalalkynes with low catalyst loading (0.1 to 0.05 mol %) when compared to the parent