Cu(<scp>ii</scp>)-catalyzed cross-dehydrogenative coupling reaction of N′-acyl arylhydrazines and phosphites
作者:Ji-Quan Zhang、Yan-Shi Xiong、Albert S. C. Chan、Gui Lu
DOI:10.1039/c6ra13931k
日期:——
A novel Cu(II)-catalyzed cross-dehydrogenative coupling reaction of N′-aryl acylhydrazines and dialkyl phosphites has been developed for the synthesis of phosphorylhydrazides by using NMO as an external oxidant and AgNO3 as additive. Various N′-aryl acylhydrazines were mildly and regioselectively converted to corresponding phosphorylhydrazides with good to excellent yields.
An efficient palladium-catalyzed oxidative annulation reaction was developed through sequential isocyanide insertions into N-H and O-H bonds of hydrazides, which provides an efficient access to valuable 2-amino-1,3,4-oxadiazoles and their derivatives.