Metal–Organic Frameworks Stabilize Mono(phosphine)–Metal Complexes for Broad-Scope Catalytic Reactions
作者:Takahiro Sawano、Zekai Lin、Dean Boures、Bing An、Cheng Wang、Wenbin Lin
DOI:10.1021/jacs.6b06239
日期:2016.8.10
Mono(phosphine)-M (M-PR3; M = Rh and Ir) complexes selectively prepared by postsynthetic metalation of a porous triarylphosphine-based metal-organic framework (MOF) exhibited excellent activity in the hydrosilylation of ketones and alkenes, the hydrogenation of alkenes, and the C-H borylation of arenes. The recyclable and reusable MOF catalysts significantly outperformed their homogeneous counterparts
Efficient deoxygenative silylation of C(sp3)–O bonds with hydrosilanes by supported Au catalysts is described. Goldnanoparticlessupported on TiO2 enabled various hydrosilanes to be used as sources of silyl groups in C–Si cross-coupling reactions. A variety of alkyl acetates and propargyl carbonates participated in the Au-catalyzed reactions to furnish the corresponding alkyl and allenylsilanes in
描述了负载型 Au 催化剂对 C(sp 3 )–O 键与氢硅烷的有效脱氧硅烷化。负载在 TiO 2上的金纳米粒子使各种氢硅烷能够在 C-Si 交叉偶联反应中用作甲硅烷基的来源。各种乙酸烷基酯和碳酸炔丙酯参与了金催化的反应,以高产率提供相应的烷基和烯丙基硅烷。此外,Au/TiO 2对环醚的开环甲硅烷基化也有效。详细的机理研究证实标题反应涉及甲硅烷基和烷基自由基中间体的形成,而 Au 纳米颗粒作为单电子转移催化剂与金属氧化物表面的路易斯酸位点的合作是氢硅烷异常反应性的原因特定的 C(sp 3 )–Si 键形成。