Reactivity of Amidinium Salts' Access to Benzo[4,5]imidazo[2,1-b]Thiazoles

Abstract We present the synthesis of benzimidazole substituted at the 1 and 2 positions. The appropriate 2-thioalkyl-substituted benzimidazoles undergo intramolecular cyclization for occuring [4,5] imidazo[2,1-b] thiazoles derivatives.