Unveiling a carbazole-based photocatalyst for visible-light-driven synthesis of indolyl diarylmethanes and 2-benzimidazoles

Abstract

A carbazole-based photocatalyst (MD) incorporating a dicyanovinyl acceptor and exhibiting superior redox potential has been demonstrated for a sustainable photocatalytic approach to synthesize indolyl diarylmethanes and 2-substituted benzimidazoles. This protocol operates via an oxidative quenching cycle of MD under visible light, eliminating the need for external oxidants or metal catalysts. The methodology offers excellent functional group tolerance, high selectivity, and environmentally friendly conditions, making it a valuable contribution to green photocatalysis.