作者:M. A. Metwally、E. Abdel-Galil、A. Metwally、F. A. Amer
DOI:10.1007/s10593-012-1101-4
日期:2012.10
4-b]pyridine derivatives. The diazonium chlorides react with N'-acyl-2-cyanoaceto-hydrazide derivatives to give the corresponding 3-hydrazonopyrazolopyridine derivatives. The latter affords the corresponding 3-hydrazonopyrazolo[3,4-b]pyridine derivatives on reflux in acetic acid. Diazo coupling of 2,4-dimethylpyrazolo[3,4-b]pyridinediazonium chloride with ketoester, e.g., ethyl benzoylacetate, is followed
吡唑并[3,4-b]吡啶重氮氯化物与多种含活性亚甲基的试剂(例如氰基乙酸芳基肼衍生物)反应,得到相应的3-水-偶氮基吡唑并[3,4-b]吡啶衍生物。重氮氯化物与N'-酰基-2-氰基乙酰乙酰肼衍生物反应,得到相应的3- 3-并吡唑并吡啶衍生物。后者在乙酸中回流时提供相应的3-hydr并吡唑并[3,4-b]吡啶衍生物。将2,4-二甲基吡唑并[3,4-b]吡啶重氮氯化物与酮酸酯(例如苯甲酰乙酸乙酯)进行重氮偶合,然后环化得到吡啶并[2',3':3,4]吡唑并[5,1-c ]三嗪衍生物。相同的二甲基吡唑并[3,4-b]吡啶重氮氯化物与不对称的β-二酮(例如苯甲酰丙酮)的重氮偶合,