Mode of Activation of Cobalt(II) Amides for Catalytic Hydrosilylation of Alkenes with Tertiary Silanes
作者:Yang Liu、Liang Deng
DOI:10.1021/jacs.6b12938
日期:2017.2.8
capable of catalyzing alkene hydrosilylation in the absence of external activators are rarely known, and their activation mode has remained poorly understood. We present here that cobalt(II) amide complexes, [Co(N(SiMe3)2)2] and its NHC adducts [(NHC)Co(N(SiMe3)2)2] (NHC = N-heterocycliccarbene), are effective catalysts for the hydrosilylation of alkenes with tertiary silanes. Mechanistic studies
在没有外部活化剂的情况下能够催化烯烃氢化硅烷化的钴 (II) 配合物很少为人所知,并且其活化模式仍然知之甚少。我们在此提出钴 (II) 酰胺配合物 [Co(N(SiMe3)2)2] 及其 NHC 加合物 [(NHC)Co(N(SiMe3)2)2](NHC = N-杂环卡宾)是烯烃与叔硅烷氢化硅烷化的有效催化剂。机理研究表明,钴 (II) 酰胺可以与氢硅烷反应形成钴 (I) 物质、甲硅烷基酰胺和氢,作为进入真正催化活性物质的入口,大概是钴 (I) 物质,用于钴催化氢化硅烷化反应。
Rapid, Regioconvergent, Solvent-Free Alkene Hydrosilylation with a Cobalt Catalyst
作者:Chi Chen、Maxwell B. Hecht、Aydin Kavara、William W. Brennessel、Brandon Q. Mercado、Daniel J. Weix、Patrick L. Holland
DOI:10.1021/jacs.5b08611
日期:2015.10.21
Alkene hydrosilylation is typically performed with Pt catalysts, but inexpensive base-metal catalysts would be preferred. We report a Co catalyst for anti-Markovnikov alkene hydrosilylation that can be used without added solvent at low temperatures with low loadings, and can be generated in situ from an air-stable precursor that is simple to synthesize from low-cost, commercially available materials
烯烃氢化硅烷化通常用 Pt 催化剂进行,但廉价的贱金属催化剂将是优选的。我们报告了一种用于抗马尔科夫尼科夫烯烃氢化硅烷化的 Co 催化剂,该催化剂可以在低温下以低负载量使用而无需添加溶剂,并且可以由空气稳定的前体原位生成,该前体易于从低成本的市售材料合成. 此外,Co 催化剂的混合物进行串联催化烯烃异构化/氢化硅烷化反应,将多种己烯异构体转化为相同的终端产物。这种区域会聚反应使用异构化作为好处而不是障碍。
SELECTIVE NON-PRECIOUS METAL-CATALYZED MONO-HYDROSILYLATION OF POLYUNSATURATED COMPOUNDS
申请人:Lewis Kenrick M.
公开号:US20120130105A1
公开(公告)日:2012-05-24
Disclosed herein is the selective synthesis of mono-hydrosilylated derivatives of polyunsaturated compounds, such as trivinylcyclohexane using non-precious metal based pyridinediimine and terpyridine complex as selective hydrosilylation catalysts.
Disclosed herein is the selective synthesis of mono-hydrosilylated derivatives of polyunsaturated compounds, such as trivinylcyclohexane using non-precious metal based pyridinediimine and terpyridine complex as selective hydrosilylation catalysts.