Urea Synthesis from Isocyanides and O-Benzoyl Hydroxylamines Catalyzed by a Copper Salt
作者:Ning Yu、Jing-Fang Lv、Shi-Mei He、Yanyan Cui、Ye Wei、Kun Jiang
DOI:10.3390/molecules27238219
日期:——
In the presence of CuOAc, a series of unsymmetric ureas can be generated in moderate to good yields under mild reaction conditions (10 mol% of CuOAc, 2 equiv t-BuONa or PhONa, 30 °C), using aryl isocyanides and O-benzoyl hydroxylamines as the readily accessible starting materials. The reactions might undergo a cascade process involving isocyanide insertion into the N-O bond and Mumm-type rearrangement
在 CuOAc 存在下,在温和的反应条件下(10 mol% 的 CuOAc,2 当量 t-BuONa 或 PhONa,30 °C),使用芳基异氰化物和 O-苯甲酰,可以生成一系列不对称脲,产率适中羟胺作为容易获得的起始原料。这些反应可能会经历一个级联过程,涉及异氰化物插入 NO 键和 Mumm 型重排。这项工作代表了异氰化物插入 NO 键的罕见例子,这将扩展异氰化物插入化学。