A new route for the synthesis of functionalized benzo[d]imidazo[5,1-b]thiazol-1-amine derivatives from benzothiazole, trichloroacetamidines and terminal alkynes

Abstract

A novel class of substituted benzo[d]imidazo[5,1-b]thiazol-1-amine derivatives was synthesized utilizing a one-pot Cu-catalyzed cycloaddition of benzothiazole, trichloroacetonitrile, various amines and terminal alkynes in acetonitrile at room temperature. The speed of this simple four-component reaction along with mild conditions, high yields, readily available starting materials, the ease of work-up without using pollutant precious metals–catalysts, and column chromatography are important features of the presented procedure.