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
通过[3 + 2]环加成反应,从1-芳基-1 H-吡唑-4-合成了一系列新的5-(1-芳基-1 H-吡唑-4-基)-1 H-四唑4a-1。甲腈3a-1,叠氮化钠和氯化铵,以二甲基甲酰胺(DMF)为溶剂,收率良好:64–85%。这些新合成的化合物的结构由IR,1 H-和13 C-NMR光谱数据和元素分析确定。