Reduction of phosphineoxides into the corresponding phosphines using PhSiH3 as a reducing agent and Ph3C+[B(C6F5)4]− as an initiator is described. The process is highly efficient, reducing a broad range of secondary and tertiary alkyl and arylphosphines, bearing various functional groups in generally good yields. The reaction is believed to proceed through the generation of a silyl cation, which reaction
描述了使用PhSiH 3作为还原剂和Ph 3 C + [B(C 6 F 5 ) 4 ] -作为引发剂将氧化膦还原成相应的膦。该方法效率很高,可以减少各种带有各种官能团的仲和叔烷基和芳基膦,收率通常很高。据信,该反应通过生成甲硅烷基阳离子进行,该阳离子与氧化膦反应提供鏻盐,进一步被硅烷还原以提供所需的膦和硅氧烷。
A more critical role for silicon in the catalytic Staudinger amidation: silanes as non-innocent reductants
作者:Keith G. Andrews、Ross M. Denton
DOI:10.1039/c7cc03076b
日期:——
We demonstrate that in situ-generated silyl ester intermediates are key mediators of the catalytic, traceless Staudinger amidation reaction.
我们展示了原位生成的硅酯中间体是催化的、无痕迹的施陀林酰胺化反应的关键中介体。
Designing a Cr-catalyst bearing redox non-innocent phenalenyl-based ligand towards hydrosilylative CO<sub>2</sub> functionalization
作者:Soumi Chakraborty、Arpan Das、Jasimuddin Ahmed、Sayani Barman、Swadhin K. Mandal
DOI:10.1039/d0cc05348a
日期:——
A Cr(iii)-complex bearing a redox non-innocent ligand initiates SET mediated silylative functionalization of CO2.
一种携带氧化还原非无辜配体的Cr(iii)络合物引发了SET介导的CO2硅基官能化反应。
Chemoselective Reduction of Tertiary Amides by 1,3-Diphenyldisiloxane (DPDS)
作者:Travis A. Hammerstad、Pooja V. Hegde、Courtney C. Aldrich、Kathleen J. Wang
DOI:10.1055/a-1709-3426
日期:2022.5
A convenient procedure for the chemoselective reduction of tertiaryamides at room temperature in the presence of air and moisture using 1,3-diphenyldisiloxane (DPDS) is developed. The reaction conditions tolerate a significant number of functional groups including esters, nitriles, secondary amides, carbamates, sulfoxides, sulfones, sulfonyl fluorides, halogens, aryl-nitro groups, and arylamines.
Metal‐Ligand Cooperativity in Mn
<sup>I</sup>
‐Catalysed N‐Formylation of Secondary Amides and Lactams Using CO
<sub>2</sub>
at Room Temperature
作者:Soumi Chakraborty、Rounak Nath、Anuj Kumar Ray、Ankan Paul、Swadhin K. Mandal
DOI:10.1002/chem.202202710
日期:2023.2
A MnI complex coordinated with a redox non-innocent phenalenyl (PLY) ligand is reported for catalytic N-formylation of secondary amides (including late-stage diversification of pharmaceutics) and lactams with CO2 as C1 source at room temperature for the first time. A combined approach of experimental analysis and DFT calculations sketch the plausible radical-mediated pathway of an unconventional metal-ligand
据报道, Mn I络合物与氧化还原非无害苯二甲酰 (PLY) 配体配位,首次在室温下以 CO 2作为 C 1源催化仲酰胺(包括后期药物多样化)和内酰胺的 N-甲酰化时间。实验分析和 DFT 计算的组合方法描绘了一种非常规金属-配体合作的可能的自由基介导途径,涉及以配体为中心的自由基。