SnO 2/SiO 2 nanocomposite catalyzed one-pot synthesis of 2-arylbenzothiazole derivatives

Abstract

SnO 2/SiO 2 nanocomposite has been synthesized by using sol-gel method. Prepared catalytic materials has been well characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmer-Teller (BET) surface area, and temperature-programmed desorption of ammonia (NH 3-TPD). SnO 2/SiO 2 nanocomposite catalyzed synthesis of 2-arylbenzothiazoles by the cyclocondensation of 2-aminothiophenol and aromatic aldehydes under reflux condition in 1:1 EtOH:H 2O. After completion of the reaction, catalyst can be recovered efficiently and reused with consistent activity.