Cyclization of Azobenzenes Via Electrochemical Oxidation Induced Benzylic Radical Generation
Anni Li, Xiangyi Li, Fang Ma, Hui Gao, Hongji Li
Abstract
An electrochemical oxidation-induced cyclization of ortho -alkyl-substituted azobenzenes has been developed. The direct electrochemical benzylic C–H functionalization with respect to azobenzenes could proceed in the absence of any catalyst or external chemical oxidant to afford a number of 2 H -indazole derivatives in moderate to good yields. This protocol enables the reuse of the byproduct to the same 2 H -indazoles, thus significantly reducing pollution discharge in synthetic chemistry.
Topics & Concepts
ChemistryIndazoleElectrochemistryCatalysisCombinatorial chemistrySurface modificationReuseOrganic chemistryPhotochemistryElectrodePhysical chemistryEcologyBiologyRadical Photochemical ReactionsCatalytic C–H Functionalization MethodsSulfur-Based Synthesis Techniques