A convenient method for the synthesis of 2-arylazocarboxylates from 2-arylhydrazinecarboxylates by aerobicoxidation with ironphthalocyanine is described. The reaction is applicable to oxidative activation of 1-acyl-2-phenylhydrazines. Some preliminary experiments suggest Michaelis–Menten kinetics and participation of radical species in the reaction mechanism.
molecules. However, its application in the site- and enantioselective functionalization of inactive aryl C–H bonds remains in its infancy. Here, we present an organocatalyst-controlled para-selective areneC–H functionalization strategy that addresses this issue, which remains an enduring challenge in arene functionalization chemistry. By emulating enzyme catalysis, the chiral phosphoric acid catalyst offers
We report the first asymmetric synthesis of P-stereogenic phosphanyl hydrazines via nickel-catalyzed asymmetric addition of primary phosphines to azo compounds. We anticipate that the remarkable versatility of these P-stereogenicsecondaryaminophosphines will facilitate the facile synthesis of both previously known and novelP-stereogenic compounds.
Rhodium(<scp>i</scp>)-catalyzed <i>N</i>-arylation of arylazocarboxylates: facile access to unsymmetrical <i>N</i>,<i>N</i>-diarylhydrazides
作者:Xiaofeng Rao、Wei-An Zhang、Ming-Hua Xu
DOI:10.1039/d3nj01022h
日期:——
A simple, efficient, and broad-scope rhodium(I)-catalyzed direct N-arylation of arylazocarboxylates with arylboronic acids has been developed, allowing access to a diverse range of unsymmetrical N,N-diarylhydrazides from readily available starting materials in high yields under extraordinary mild conditions. The reaction features easy operation, ambient temperature and low catalyst loading (as low