A simple and eco-friendly process catalyzed by montmorillonite K-10, with air as oxidant, for synthesis of 2-substituted benzothiazoles

摘要

Simple and eco-friendly synthesis of 2-substituted benzothiazoles is described. The reaction is performed in absolute ethanol at room temperature, using a catalytic amount of montmorillonite K-10, and with continuous bubbling of air as oxidant. Simplicity, ease of handling of the system, an environmentally friendly and reusable catalyst, a plentiful, inexpensive, and safe oxidant, and mild conditions are the main advantages of this procedure.