Ultrasound-assisted efficient and green synthesis of 2-substituted benzothiazoles under solvent-free condition using recyclable sulfated tungstate. Issue 23 (2nd December 2021)

• Record Type: Journal Article
• Authors: Pise, Ashok S.; Ingale, Ajit P.; Dalvi, Navnath R.
• Is Part Of: Synthetic communications. Volume 51:Issue 23(2021)
• Page Start: 3629
• Page End: 3641
• Publication Date: 2021-12-02
• Subjects: 2-Aminothiophenol -- benzothiazoles -- sulfated tungstate -- ultrasound; Organic compounds -- Synthesis -- Periodicals; Chemistry, Organic; Synthesis; 547.205
• DOI: 10.1080/00397911.2021.1986842
• Languages: English
• ISSNs: 0039-7911

Abstract

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: UF0001