Journal
SYNTHETIC COMMUNICATIONS
Volume 51, Issue 23, Pages 3629-3641Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00397911.2021.1986842
Keywords
2-Aminothiophenol; benzothiazoles; sulfated tungstate; ultrasound
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An efficient and ecofriendly method for synthesizing 2-substituted benzothiazoles using sulfated tungstate catalysis has been described. The protocol offers advantages such as faster reaction rate, solvent-free or mild reaction conditions, wide functional group compatibility, excellent yields, easy work-up procedure, and excellent catalyst recyclability, making it more practicable, cost-effective, and environmentally benign.
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.
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