SnO2/SiO2 Nanocomposite Catalyzed One-Pot Synthesis of 2-Arylbenzothiazole Derivatives

SnO2/SiO2 nanocomposite has been synthesized by using sot-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 (NH3-TPD). SnO2/SiO2 nanocomposite catalyzed synthesis of 2-arylbenzothiazoles by the cyclocondensation of 2-aminothiophenol and aromatic aldehydes under reflux condition in 1:1 EtOH:H2O. After completion of the reaction, catalyst can be recovered efficiently and reused with consistent activity.