Palladium-Catalyzed Aerobic Oxidative Carbonylation of Amines Enables the Synthesis of Unsymmetrical N,N′-Disubstituted Ureas
作者:Honglan Zeng、Hongyan Du、Wei Han、Xu Gong、Jie Zhang
DOI:10.1055/a-1500-9673
日期:2021.7
A ligand-free palladium-catalyzed aerobic oxidative carbonylation of amines for the synthesis of ureas, particular unsymmetrically N,N′-disubstituted ureas, which cannot be accessed by any other palladium-catalyzed oxidative carbonylation of amines to date, is presented. An array of symmetrical and unsymmetrical ureas were straightforwardly synthesized by using inexpensive, readily available, stable
提出了用于合成脲的无配体的钯催化的胺的好氧氧化羰基化反应,特别是不对称的N,N'-二取代的脲,迄今为止,其他任何钯催化的胺的氧化羰基化反应均无法获得。通过使用廉价,易于获得,稳定和安全的胺,在1个大气压下以良好或优异的收率直接合成了一系列对称和不对称的脲。这种新颖的方法采用氧气作为唯一氧化剂,为基于过渡金属的氧化剂系统提供了有吸引力的替代方法