NiCl2·6H2O as recyclable heterogeneous catalyst for N-arylation of amines and NH-heterocycles under microwave exposure

NiCl2·6H2O has been proven to be an effective catalyst for the coupling of amines with aryl iodides without ligand under solvent-free conditions employing microwave irradiation. Reactions cleanly result in coupled products in a short reaction time. The catalyst, being heterogeneous, is recovered by filtration and is recyclable.