Electrochemical reactions. Part 20. Intramolecular cyclisation during the reduction of 2-chloro-NN-diphenylbenzamides
Abstract
The aryl radical formed by reductive cleavage of the carbon–chlorine bond in 2-chloro-NN-diphenylbenzamide undergoes exclusive capture by the neighbouring N-phenyl group to yield N-phenylphenanthridone and biphenyl-2-carboxanilide. 2-Chloro-NN-di-4-tolylbenzamide undergoes a similar reaction.