A ligand free Ru/C-catalyzed amination of 2-halo azoles with a broad scope of aminating reagents has been developed. Utilizing this protocol a variety of 2-aminoazole derivatives were synthesized in moderate to good yields. The methodology is operationally simple and it provides potentially useful products by using an inexpensive recyclable catalytic system.
The use of the bifunctional CuII/H-USY catalyst for the direct amination of azoles under air and without additives has been disclosed.