CuII/H-USY as a regenerable bifunctional catalyst for the additive-free C-H amination of azoles

A copper-exchanged H-USY zeolite catalyst was developed for the direct C-H amination of azoles with secondary amines in HFIP. The reaction was performed under air without any external additive. The Cu/H-USY catalyst could be regenerated for further re-use without significant decrease in activity.