Chemoselective electrochemical reduction of nitroarenes with gaseous ammonia
作者:Liu Chang、Jin Li、Na Wu、Xu Cheng
DOI:10.1039/d1ob00077b
日期:——
Valuable aromatic nitrogen compounds can be synthesized by reduction of nitroarenes. Herein, we report electrochemicalreduction of nitroarenes by a protocol that uses inert graphite felt as electrodes and ammonia as a reductant. Depending on the cell voltage and the solvent, the protocol can be used to obtain aromatic azoxy, azo, and hydrazo compounds, as well as aniline derivatives with high chemoselectivities
Oxidative Coupling of Aromatic Amines and Nitrosoarenes: Iodine-Mediated Formation of Unsymmetrical Aromatic Azoxy Compounds
作者:Xiaochun Yu、Weijie Ding、Panyu Ge、Shun Wang、Jichang Wang
DOI:10.1002/adsc.201800495
日期:2018.8.17
I2/DABCO (iodine/1,4‐diazabicyclo[2.2.2]octane)‐mediated oxidative coupling of nitrosobenzenes with aromatic amines was revealed to lead to the production of unsymmetrical aromatic azoxy compounds, instead of azo compounds reported previously in Mills reaction. Our study illustrates that various aromatic amines can be efficiently coupled with nitrosobenzenes to produce unsymmetrical azoxy product,
I 2 / DABCO(碘/ 1,4-二氮杂双环[2.2.2]辛烷)介导的亚硝基苯与芳族胺的氧化偶合可导致产生不对称的芳族乙氧基化合物,而不是先前Mills反应中报道的偶氮化合物。我们的研究表明,各种芳香胺可以与亚硝基苯有效偶联,生成不对称的a氧基产物,其中已经成功制备了三十多种不对称的a氧基苯。适用于广泛的底物,大规模可扩展性和温和的反应条件,使这种新的合成方案非常实用,可方便且直接地获得不对称的乙氧基苯。