An Efficient Synthesis of New 5??(1??Aryl??1H??pyrazole??4??yl)??1H??tetrazoles from 1??Aryl??1H??pyrazole??4??carbonitriles via [3+ 2] Cycloaddition Reaction

…, L Pinheiro, MM Canto??Cavalheiro…

Index: Dos Santos, Mauricio S.; Bernardino, Alice M. R.; Pinheiro, Luiz C. S.; Canto-Cavalheiro, Marilene M.; Leon, Leonor L. Journal of Heterocyclic Chemistry, 2012 , vol. 49, # 6 p. 1425 - 1428

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Abstract

Abstract A series of new 5-(1-aryl-1H-pyrazole-4-yl)-1H-tetrazoles 4a-l were synthesized via [3+ 2] cycloaddition reaction from 1-aryl-1H-pyrazole-4-carbonitriles 3a-l, sodium azide and ammonium chloride, using dimethylformamide (DMF) as solvent, in good yields: 64–85%. The structures of these newly synthesized compounds were determined from the IR, 1 H-and 13 C-NMR spectroscopic data and elemental analyses.

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