Visible Light-Driven Radical <i>trans</i>-Hydrosilylation of Electron-Neutral and -Rich Alkenes with Tertiary and Secondary Hydrosilanes
作者:Jing Zhu、Wei-Chen Cui、Shaozhong Wang、Zhu-Jun Yao
DOI:10.1021/acs.joc.8b02409
日期:2018.12.7
regio-, and stereoselective manner. Comparison of the reactivity of diene compounds and late-stage hydrosilylation of steroid drugs were also explored. Deuterium labeling experiments reveal that a stepwise formation of C–Si and C–H bonds with a trans stereochemistry is preferred, in which the thiol may behave as a hydrogen atom transfer agent.
Efficient alkene hydrosilation with bis(8-quinolyl)phosphine (NPN) nickel catalysts. The dominant role of silyl-over hydrido-nickel catalytic intermediates
作者:Jian Yang、Verònica Postils、Michael I. Lipschutz、Meg Fasulo、Christophe Raynaud、Eric Clot、Odile Eisenstein、T. Don Tilley
DOI:10.1039/d0sc00997k
日期:——
A cationicnickelcomplex of the bis(8-quinolyl)(3,5-di-tert-butylphenoxy)phosphine (NPN) ligand, [(NPN)NiCl]+, is a precursor to efficient catalysts for the hydrosilation of alkenes with a variety of hydrosilanes under mild conditions and low catalyst loadings. DFT studies reveal the presence of two coupled catalytic cycles based on [(NPN)NiH]+ and [(NPN)NiSiR3]+ active species, with the latter being
[EN] FIRST ROW METAL-BASED CATALYSTS FOR HYDOSILYLATION<br/>[FR] CATALYSEURS D'HYDROSILYLATION À BASE DE MÉTAUX DE LA PREMIÈRE RANGÉE
申请人:UNIV CALIFORNIA
公开号:WO2013120057A1
公开(公告)日:2013-08-15
In various embodiments, the invention provides phosphine ligand supported first row metal catalysts with surprising and efficacious catalytic activity for hydrosilylation of pi-bonded substrates. Also provided are methods of using the catalysts of the invention to prepare hydrosilylated compounds.
A dual metal and radical reactivity is enabled by a polymetallic nickel complex merging alloxazine and catechol redox-active subunits. This is the first catalytic application of an alloxazine 3d metal complex and this complex promotes silyl radical generation and chain walking of internal alkenes.
通过合并咯嗪和儿茶酚氧化还原活性亚基的多金属镍络合物实现双重金属和自由基反应性。这是咯嗪 3d 金属络合物的首次催化应用,该络合物促进甲硅烷基自由基的产生和内部烯烃的链行走。