Base‐Mediated O‐Arylation of Alcohols and Phenols by Triarylsulfonium Triflates
作者:Xiao‐Xia Ming、Ze‐Yu Tian、Cheng‐Pan Zhang
DOI:10.1002/asia.201900968
日期:2019.10
A mild and efficient protocol for O-arylation of alcohols and phenols (ROH) by triarylsulfonium triflates was developed under transition-metal-free conditions. Various alcohols, including primary, secondary and tertiary, and phenols bearing either electron-donating or electron-withdrawing groups on the aryl rings were smoothly converted to form the corresponding aromatic ethers in moderate to excellent
Catalytic N-Alkylation of Amines Using Carboxylic Acids and Molecular Hydrogen
作者:Iván Sorribes、Jose R. Cabrero-Antonino、Cristian Vicent、Kathrin Junge、Matthias Beller
DOI:10.1021/jacs.5b07994
日期:2015.10.28
green N-alkylation of amines has been accomplished by applying readily available carboxylic acids in the presence of molecular hydrogen. Applying an in situ formed ruthenium/triphos complex and an organic acid as cocatalyst, a broad range of alkylated secondary and tertiary amines are obtained in good to excellent yields. This novel method is also successfully applied for the synthesis of unsymmetrically
通过在分子氢存在下应用容易获得的羧酸,已经实现了胺的方便、实用和绿色的 N-烷基化。应用原位形成的钌/三磷配合物和有机酸作为助催化剂,可以以良好到极好的收率获得范围广泛的烷基化仲胺和叔胺。这种新方法还成功地应用于通过相应胺、羧酸和作为 C1 源的 CO2 的直接三组分偶联反应合成不对称取代的 N-甲基/烷基苯胺。
Direct Catalytic N-Alkylation of Amines with Carboxylic Acids
作者:Iván Sorribes、Kathrin Junge、Matthias Beller
DOI:10.1021/ja5093612
日期:2014.10.8
A straightforward process for the N-alkylation of amines has been developed applying readily available carboxylicacids and silanes as the hydride source. Complementary to known reductive aminations, effective C-N bond construction proceeds under mild conditions and allows obtaining a broad range of alkylated secondary and tertiary amines, including fluoroalkyl-substituted anilines as well as the bioactive
The catalytic effect of copper ions in the phenylation reaction of david and thieffry
作者:Derek H. R. Barton、Jean-Pierre Finet、Clotilde Pichon
DOI:10.1039/c39860000065
日期:——
Several types of bifunctional molecules are smoothly phenylated by triphenylbismuth diacetate in a reaction which has an intduction period, a curious solvent dependence, and the need for illumination; however, the addition of a small amount of Cu(OAc)2 removes all these limitations and accelerates greatly the reaction.
title compounds, to be checked later in novel syntheses of heterocyclic compounds. To the best of our knowledge, there was no report in the literature of any well-established method for the preparation of N-(2-phenoxyethyl)anilines 1.