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

Abstract

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

Graphical Abstract

Keywords:

• 2-Aminothiophenol
• benzothiazoles
• sulfated tungstate
• ultrasound

Acknowledgments

The authors are grateful to Central Instrumentation Facility SPPU, Pune and DST-FIST Instrumentation Facility, Dada Patil College, Karjat for providing spectral analysis. We express our special thanks to Principal, K. J. Somaiya College of Arts, Commerce & Science, Kopargaon for his constant support

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.