锰催化烯烃的氢化硅烷化和氢硼化反应是使用单一的锰(II)预催化剂和反应方案开发的。两种反应均能很好地控制区域选择性,并能在多种空间和电子分化的底物上获得高收率(25个实例)。使用NaO t Bu进行的醇盐活化是催化剂前活化和反应活性的关键。对于这两种已开发的方法,催化剂的负载量都低至0.5 mol%,从而实现了跨各种官能团和以克为单位的催化作用。
A Diphosphino-Functionalised MCM-41-Anchored Platinum Complex: An Efficient and Reusable Catalyst for the Hydrosilylation of Olefins
作者:Lingfang Zha、Wenyan Hao、Mingzhong Cai
DOI:10.3184/030823410x12887259824283
日期:2010.11
diphosphino-functionalised MCM-41 anchored platinumcomplex (MCM-41-2P-Pt) was conveniently synthesised from commercially available and cheap γ-aminopropyltriethoxysilane via immobilisation on MCM-41, followed by reactiopn with diphenylphosphinomethanol and potassium chloroplatinite. It was found that the title complex is a highly efficient catalyst for the hydrosilylation of olefins with triethoxysilane and can
<i>N,N</i>
‐Dimethylformamide‐protected Fe
<sub>2</sub>
O
<sub>3</sub>
Combined with Pt Nanoparticles: Characterization and Catalysis in Alkene Hydrosilylation
disclose a combination of N,N-dimethylformamide (DMF)-protected Fe2O3 nanoparticles (NPs) and Pt NPs catalyst system for the hydrosilylation of various functional alkenes and tertiarysilanes. The catalyst of DMF-protected Fe2O3/Pt NPs can be recycled for five times by a simple extraction. The developed combination Fe2O3/Pt NPs catalyst is effective up to the 1-kilogram scale.
纳米催化:我们公开了N,N-二甲基甲酰胺 (DMF) 保护的 Fe 2 O 3纳米粒子 (NPs) 和 Pt NPs 催化剂体系的组合,用于各种功能性烯烃和叔硅烷的氢化硅烷化。DMF保护的Fe 2 O 3 /Pt NPs催化剂可以通过简单的提取循环使用五次。所开发的 Fe 2 O 3 /Pt NPs 组合催化剂在 1 公斤级有效。
Hydrosilylation of olefins over rhodium complex anchored over thioether-functionalized MCM-41
作者:Lig Fang Zha、Wei Sen Yang、Wen Yan Hao、Ming Zhong Cai
DOI:10.1016/j.cclet.2010.06.007
日期:2010.11
hydrosilylation of alkenes with triethoxysilane has been achieved at 120 °C in the presence of 0.01 mol% of thioether-functionalized MCM-41 anchored rhodiumcomplex, affording the corresponding addition products in 68–91% yields. This supported rhodiumcomplex can be reused several times without noticeable loss of activity. Our system not only solves the basic problems of catalyst separation and recovery
MCM-41-Supported Bidentate Phosphine Rhodium Complex: An Efficient and Recyclable Heterogeneous Catalyst for the Hydrosilylation of Olefins
作者:Ronghua Hu、Wenyan Hao、Mingzhong Cai
DOI:10.1002/cjoc.201180292
日期:2011.8
MCM‐41‐supported bidentatephosphinerhodiumcomplex (MCM‐41‐2P‐RhCl3) was conveniently synthesized from commercially available and cheapγ‐aminopropyltriethoxysilane via immobilization on MCM‐41, followed by reacting with diphenylphosphinomethanol and rhodium chloride. It was found that the title complex is a highly efficientcatalyst for the hydrosilylation of olefins with triethoxysilane and can
MCM-41-Immobilised Bidentate Nitrogen Platinum Complex: A Highly Efficient and Recyclable Phosphine-Free Catalytic System for the Hydrosilylation of Olefins
作者:Hean Zhang、Jiaqin Liu、Shaojuan Cheng、Mingzhong Cai
DOI:10.3184/174751912x13324196074823
日期:2012.4
MCM-41-immobilised bidentate nitrogen platinum complex (MCM-41-2N-Pt) was very conveniently synthesised from commercially available and cheap 3-(2-aminoethylamino)propyltrimethoxysilane by immobilisation on the mesoporous silica nanoparticles, MCM-41, followed by reaction with potassium chloroplatinite. It was found that the MCM-41-2N-Pt complex is a highly efficientcatalyst for the hydrosilylation of olefins with