Studies with Azinylacetonitriles: 2-Pyridylacetonitrile as a Precursor to Functionally Substituted Pyridines
作者:Mariam Al-Sheikh、Mohamed Elnagdi
DOI:10.3390/molecules14114406
日期:——
2-Pyridylacetonitrile (1) couples with aromatic diazonium salts to yield arylhydrazones 2a-c, that were shown to exist in the syn-form 2 rather than the anti-form 4. Compounds 2a,c reacted with hydroxylamine in refluxing DMF to yield the interesting 1,2,3-triazolylpyridines 6. Attempts to cyclize 2 to give the corresponding fused pyrazolopyridines 9 failed. On the other hand, compound 1 condensed with
2-吡啶基乙腈 (1) 与芳族重氮盐偶联生成芳腙 2a-c,显示以顺式 2 而非反式 4 存在。化合物 2a、c 在回流 DMF 中与羟胺反应生成有趣的 1,2,3-三唑基吡啶 6。尝试环化 2 以得到相应的稠合吡唑并吡啶 9 失败。另一方面,化合物 1 与二甲基甲酰胺二甲基缩醛缩合得到烯胺腈 10,它可以转化为吡唑基吡啶 11。