Manganese‐Catalyzed Hydrofunctionalization of Alkenes
作者:Jonathan R. Carney、Barry R. Dillon、Leonie Campbell、Stephen P. Thomas
DOI:10.1002/anie.201805483
日期:2018.8.13
The manganese‐catalyzed hydrosilylation and hydroboration of alkenes has been developed using a single manganese(II) precatalyst and reaction protocol. Both reactions proceed with excellent control of regioselectivity and in high yields across a variety of sterically and electronically differentiated substrates (25 examples). Alkoxide activation, using NaOtBu, was key to precatalyst activation and
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。
Bench-Stable, Substrate-Activated Cobalt Carboxylate Pre-Catalysts for Alkene Hydrosilylation with Tertiary Silanes
作者:Christopher H. Schuster、Tianning Diao、Iraklis Pappas、Paul J. Chirik
DOI:10.1021/acscatal.6b00304
日期:2016.4.1
High-spin pyridine diimine cobalt(II) bis(carboxylate) complexes have been synthesized and exhibit high activity for the hydrosilylation of a range of commercially relevant alkenes and tertiary silanes. Previously observed dehydrogenative silylation is suppressed with the use of sterically unencumbered ligands, affording exclusive hydrosilylation with up to 4000 TON. The cobalt precatalysts were readily
Program Severo Ochoa SEV-2016-0683 is gratefully acknowledged. S. G. T. and P. O.-B. thank MINECO for a FPU Ph.D. fellowship FPU16/02117 and a Ramon y Cajal contract RYC-2014-16620, respectively. Authors would like to thank Prof. Avelino Corma for discussion on the work and support. Authors would like to thank Ms. Adelina Munoz, Dr. Alejandro Vidal, and Ms. Carmen Clemente for the Raman, EPR, and ESI-MS
非常感谢计划 Severo Ochoa SEV-2016-0683。SGT 和 PO-B。感谢 MINECO 获得 FPU 博士学位。分别获得 FPU16/02117 奖学金和 Ramon y Cajal 合同 RYC-2014-16620。作者要感谢 Avelino Corma 教授对工作的讨论和支持。作者要感谢 Adelina Munoz 女士、Alejandro Vidal 博士和 Carmen Clemente 女士分别进行的拉曼、EPR 和 ESI-MS 测量。作者还感谢使用 RIAIDT(圣地亚哥德孔波斯特拉大学)的 X 射线单元的分析设施。
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。
Rhodium(I)-mono- und -diazadienkomplexe, synthese, spektroskopische charakterisierung, oxidative additionsreaktionen und einsatz in der homogenen katalyse zur hydrosilylierung
作者:Monika Brockmann、Heindirk tom Dieck、Jürgen Klaus