An Efficient Synthesis of New 5-(1-Aryl-1<i>H</i>-pyrazole-4-yl)-1<i>H</i>-tetrazoles from 1-Aryl-1<i>H</i>-pyrazole-4-carbonitriles<i>via</i>[3 + 2] Cycloaddition Reaction
作者:Maurício S. dos Santos、Alice M. R. Bernardino、Luiz C. S. Pinheiro、Marilene M. Canto-Cavalheiro、Leonor L. Leon
DOI:10.1002/jhet.928
日期:2012.11
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, 1H‐ and 13C‐NMR spectroscopic data and elemental analyses