Visible-light-induced direct 3-ethoxycarbonylmethylation of 2-aryl-2<i>H</i>-indazoles in water

Abstract

A visible-light-driven rhodamine B-catalyzed transition-metal-free 3-ethoxycarbonylmethylation of 2-aryl-2 H -indazoles and imidazo[1,2- a ]pyridines (40 examples) using commercially available α-bromoesters was realized in water.