Novel, Mild, and Highly Efficient Method for the Synthesis of 2-Arylbenzothiazoles by the Oxidation of 2-Arylbenzothiazolines with Silicon Lewis Acids

Abstract

Oxidation of structurally diverse 2-arylbenzothiazolines to give the corresponding 2-arylbenzothiazoles has been carried out in benzene using dimethyldichlorosilane and trimethylchlorosilane. Short reaction times, mild reaction conditions, easy and quick isolation of the products, and excellent yields are the main advantages of this procedure.

Keywords:

• Benzothaizoles
• benzothiazolines
• dimethyldichlorosilane
• silicon Lewis acids
• trimethylchlorosilane

ACKNOWLEDGMENT

The authors are grateful to the Sophisticated Analytical Instrumentation Facility (SAIF), Panjab University, Chandigarh, India, for providing the NMR facility and elemental analysis.

Notes

Note. All the products were characterized by IR, NMR, and comparison of melting points with those reported in the literature.