trihydrosilanes was achieved in a highly selective fashion assisted by continuous-flow micro-tubing reactors. The ability to access silyl radicals using photocatalytic Si-H activation promoted by eosin Y offers new perspectives for the synthesis of valuable silicon reagents in a convenient and green manner.
Treatment of 1-aryl-2,5-diphenylpyrroles with lithium powder in tetrahydrofuran at 0 °C results in the generation of the corresponding aryllithium reagents through reductive C–N bond cleavage.
Palladium-catalyzed Direct C–H Bond Arylation of Simple Arenes with Aryltrimethylsilanes
作者:Kenji Funaki、Hiroshi Kawai、Tetsuo Sato、Shuichi Oi
DOI:10.1246/cl.2011.1050
日期:2011.9.5
Direct C–H bond arylation of arenes with aryltrimethylsilanes catalyzed by PdCl2 in the presence of CuCl2 as an oxidant has been developed. In addition to the role as the oxidant, CuCl2 is found to be necessary for the selective cross-coupling reaction.
N,N-Dimethylformamide-stabilised Pd nanocluster (NC) catalysed cross-coupling reactions of hydrosilane/disilane have been investigated. In this reaction, the coupling reaction proceeds without ligands with low catalyst loading. N,N-Dimethylacetamide is a crucial solvent in these reactions. The solvent effect was considered by various techniques, such as transmission electron microscopy, X-ray photoelectron
已经研究了N , N -二甲基甲酰胺稳定的 Pd 纳米簇 (NC) 催化的氢硅烷/乙硅烷的交叉偶联反应。在该反应中,偶联反应在没有具有低催化剂负载的配体的情况下进行。N,N-二甲基乙酰胺是这些反应中的关键溶剂。通过各种技术考虑溶剂效应,例如透射电子显微镜、X射线光电子能谱和热重分析。Pd NCs 可以在氢硅烷和乙硅烷反应条件下循环五次。
A Mild and Ligand-Free Ni-Catalyzed Silylation via C–OMe Cleavage
作者:Cayetana Zarate、Masaki Nakajima、Ruben Martin
DOI:10.1021/jacs.6b10998
日期:2017.1.25
of central importance in organic synthesis. Despite the formidable potential of aryl methyl ethers as coupling partners, the scarcity of metal-catalyzed C-heteroatom bond formations via C-OMe cleavage is striking, with isolated precedents requiring specialized, yet expensive, ligands, high temperatures, and π-extended backbones. We report an unprecedented catalytic ipso-silylation of aryl methyl ethers