Cu/Cu <sub>2</sub> O@g‐C <sub>3</sub> N <sub>4</sub> : Recyclable Photocatalyst under Visible Light to Access 2‐Aryl‐/benzimidazoles/benzothiazoles in Water
Puneet Kumar Singh, Smita R. Bhardiya, Ambika Asati, Vijai K. Rai, Manorama Singh, Ankita Rai
Abstract
Abstract An unprecedented Cu/Cu 2 O@g‐C 3 N 4 catalysed visible light driven green synthesis of 2‐aryl‐/benzimidazoles and benzothiazoles is reported via condensation of structurally different aldehydes with o ‐phenylenediamine and o ‐aminothiophenol respectively. Herein, Synergistic catalysis is operating as both Cu/Cu 2 O@g‐C 3 N 4 and visible‐light condition are required, no product was isolated in absence of either. Operational simplicity, ambient reaction conditions, aqueous medium, good yield of products (80–94 %) and recyclability of the catalyst without any loss in catalytic efficiency and selectivity are salient features of the envisaged protocol.