Application of N,N′-diiodo-N,N′-1,2-ethandiylbis(p-toluene sulfonamide) as a new reagent for synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles under solvent-free conditions

N,N′-Diiodo-N,N′-1,2-ethandiylbis(p-toluene sulfonamide) (NIBTS) is a good and new reagent for synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles at room temperature under solvent-free condition with good to high yield. Absence of solvent, short reaction times, non-corrosive, operational simplicity and environmentally friendliness are the main advantages of this procedure.