Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (11): 1918-1924.DOI: 10.1016/S1872-2067(17)62920-6

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Environmentally friendly, microwave-assisted synthesis of 5-substituted 1H-tetrazoles by recyclable CuO nanoparticles via (3+2) cycloaddition of nitriles and NaN3

R. D. Padmajaa, Sourav Rejb, Kaushik Chandaa   

  1. a Department of Chemistry, School of Advanced Sciences, VIT University, Vellore-632014, India;
    b Institute of Bioengineering and Nanotechnology, A*STAR. 31 Biopolis Way, Singapore-138669
  • Received:2017-08-07 Revised:2017-09-16 Online:2017-11-18 Published:2017-11-24
  • Contact: 10.1016/S1872-2067(17)62920-6

Abstract:

Recyclable CuO nanoparticles were successfully employed to catalyze the microwave-assisted (3+2) cycloaddition reaction between nitriles and NaN3 to efficiently synthesize 5-substituted 1H-tetrazoles. The salient features associated with this protocol are its cost effectiveness, rapid synthesis, stability, reusability, mild reaction conditions without any additives, high tolerance to various func-tional groups, and excellent yields under microwave irradiation. This environmentally friendly, microwave-assisted, nanoparticle-catalyzed synthetic methodology is seen as an alternative to conventional procedures that involve Lewis acid catalysts and a simple operation to the privileged scaffold.

Key words: Tetrazoles, CuO nanoparticles, (3+2) cycloaddition, Green chemistry, Microwave irradiation