<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。
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
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。
Highly-active, graphene-supported platinum catalyst for the solventless hydrosilylation of olefins
作者:Caleb J. Kong、Stanley E. Gilliland、Brian R. Clark、B. Frank Gupton
DOI:10.1039/c8cc07641c
日期:——
report the development of the first graphene-supported platinumcatalyst that has demonstrated exceptional catalytic activity and stability for hydrosilylation reactions of olefins (TOF 4.8 × 106 h−1, TON = 9.4 × 106). The catalyst also exhibited functional group tolerance over a broad range of industrially relevant substrates with minimal metal leaching. In addition, the catalystsystem was successfully
本文中,我们报道了第一个石墨烯负载的铂催化剂的开发,该催化剂已证明对烯烃的氢化硅烷化反应具有出色的催化活性和稳定性(TOF 4.8×10 6 h -1,TON = 9.4×10 6)。该催化剂还具有广泛的工业相关底物,并且具有最少的金属浸出,对官能团具有耐受性。此外,该催化剂体系已成功转化为用于连续氢化硅烷化反应的填充床平台。