Synthesis of New Substituted Pyridopyrazolotriazines
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., ethylbenzoylacetate, is followed