KOH-Mediated Synthesis of Substituted Isothiazoles via Two-Component Annulation with Dithioate and Aryl Acetonitrile.

We report a simple synthetic method for obtaining 3-hydroxy-4,5-disubstituted isothiazoles utilizing dithioester and aryl acetonitrile. The isothiazoles obtained in this method involve the formation of new C-C, C-O, and N-S bonds in one step using a simple base such as KOH under aerial conditions. The 3-hydroxy-4,5-disubstituted isothiazole was successfully employed for further functionalization. The strategy provides high selectivity for the synthesis of isothiazoles, which may have applications in pharmaceuticals, organic materials, and agrochemicals in both academic and industrial settings.