A Photoinduced Multicomponent Regioselective Synthesis of 1,4,5‐Trisubstituted‐1,2,3‐Triazoles: Transition Metal‐, Azide‐ and Oxidant‐Free Protocol

Abstract

Abstract A transition metal‐ and azide‐free approach is explored to synthesize 1,4,5‐trisubstituted‐1,2,3‐triazoles under sunlight. The reaction proceeds via C−N and N−N bond formations. These regioselective 1,2,3‐triazoles are obtained from isatin Schiff bases, benzaldehydes and tosylhydrazine in the presence of base. This protocol offers the structurally diverse 1,2,3‐triazole derivatives with 75–90% yields. magnified image