Microwave promoted one-pot synthesis of tetrazoles catalyzed by zinc sulfide nanoparticles as a recyclable heterogeneous catalyst

The microwave assisted synthesis of 1-substituted-1H-tetrazoles was developed by using of zinc sulfide nanoparticles as heterogeneous catalyst under solvent free conditions. The experimental results were shown that a series of 1-substituted tetrazole derivatives were synthesized under microwave irradiation by ZnS NPs as an effective and recoverable heterogeneous catalyst in excellent yields. This protocol has advantages rather than other reported methods such as non-acidic catalyst, solvent-free conditions and greener process as well as a solid recyclable catalyst. The catalyst was recovered and reused for several cycles with consistent activity.

Keywords:

Microwave irradiation , Tetrazoles , Zinc sulfide nanoparticles , Cyclization , Primary amines