A Novel Synthesis of 2-Arylbenzimidazole and 2-Arylbenzothiazole Derivatives by MnO

Abstract

The main objective of this research is to develop efficient and environmentally benign heterogeneous catalysts for synthesis of 2-arylbenzimidazole and 2-arylbenzothiazoles derivatives by MnO2/MOF-199. For this purpose, a heterogeneous MnO2/MOF-199 catalyst was prepared by the solvothermal method, and the prepared catalyst was characterised by various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET, IR, thermogravimetric–differential thermogravimetric (TG-DTG), and temperature-programmed desorption with ammonia (NH3-TPD) analysis. The solid catalyst, with a MnO2/MOF-199 loading of 9 %, demonstrated a high catalytic activity in the synthesis of 1,2-arylbenzimidazole and 1,2-arylbenzothiazole derivatives and the catalyst could be reused for at least 5 cycles under mild conditions.