Ultrasound-assisted efficient and green synthesis of 2-substituted benzothiazoles under solvent-free condition using recyclable sulfated tungstate

Sulfated tungstate catalyzed an efficient and ecofriendly protocol has been described for the synthesis of 2-substituted benzothiazoles. The corresponding benzothiazoles were obtained using a condensation reaction 2-aminothiophenol with various aldehydes under ultrasound irradiation at room temperature. Various functional groups on as well tolerated to provide derivatives in excellent yields. faster rate, solvent-free or mild conditions, wide group compatibility, yields, easy work-up procedure, catalyst recyclability are advantages this protocol. These make process more practicable, cost-effective, environmentally benign.