Electrosynthesis of Azobenzenes Directly from Nitrobenzenes
作者:Yanfeng Ma、Shanghui Wu、Shuxin Jiang、Fuhong Xiao、Guo‐Jun Deng
DOI:10.1002/cjoc.202100470
日期:2021.12
The electrochemical reduction strategy of nitrobenzenes is developed. The chemistry occurs under ambient conditions. The protocol uses inert electrodes and the solvent, DMSO, plays a dual role as a reducing agent. Its synthetic value has been demonstrated by the highly efficient synthesis of symmetric, unsymmetric and cyclic azo compounds.
Iron and Nitrogen Co‐Doped Mesoporous Carbon‐Based Heterogeneous Catalysts for Selective Reduction of Nitroarenes
作者:Jitao Wang、Xiaochun Yu、Chongyang Shi、Dajie Lin、Jun Li、Huile Jin、Xian Chen、Shun Wang
DOI:10.1002/adsc.201900467
日期:2019.8.5
A facile fabrication of Fe and N co‐doped mesoporous carbon (MC), as an efficient heterogeneous catalyst for the highly selective reduction of nitroarenes, is described. The Fe and N co‐doped MC nanosheets are easily synthesized via a hydrothermal reaction between citrate acid and magnesium citrate, followed by calcination in the presence of melamine and potassium ferrocyanide. The Fe−N complex provides
pathway for the Pd-catalyzed regiospecific ortho-acylation of azoarenes using benzylic ethers as acyl equivalents has been achieved. In the absence of palladium catalyst, amide compounds were formed by the reaction of azoarenes with benzylic ethers under certain conditions. Various mono-acylazobenzene and amide compounds were obtained in good yields (35 examples). The mono-acylated products and amide
Palladium-Catalyzed Direct <i>ortho</i> Alkoxylation of Aromatic Azo Compounds with Alcohols
作者:Zhangwei Yin、Xiaoqing Jiang、Peipei Sun
DOI:10.1021/jo401623j
日期:2013.10.4
highly regioselective synthesis of 2-alkoxy aromatic azo compounds via palladium(II)-catalyzed alkoxylation of azobenzene derivatives directed by the azo group using alcohols as the alkoxylation reagents and PhI(OAc)2 as the oxidant has been developed. The method is applicable to both primary and secondary alcohols and affords moderate to good yields.
Tuneable Copper Catalysed Transfer Hydrogenation of Nitrobenzenes to Aniline or Azo Derivatives
作者:Maria Jesus Moran、Katia Martina、Francesca Baricco、Silvia Tagliapietra、Maela Manzoli、Giancarlo Cravotto
DOI:10.1002/adsc.202000127
日期:2020.7.16
A highly versatile and flexible copper nanoparticle (Cu(0) NPs) catalytic system has been developed for the controlled and selective transfer hydrogenation of nitroarene.