Synthesis and some reactions of 7-methyl-5-phenyl-5<i>H</i>-pyrazolo[3,4-e]1,2,4-triazine-3-thiol
作者:Mohamed Salah Kamel Youssef、Ferial Mohamed Atta、Khairy Mohamed Hassan、Mohamed Saad Abbady
DOI:10.1002/jhet.5570210362
日期:1984.5
The title compoundII has been prepared by the reaction of 3-methyl-1-phenyl-4-oxo-5-pyrazolone with thiosemicarbazide in aqueous potassium carbonate. Alkylation of II on the sulfur atom in aqueous sodium hydroxide afforded the 3-alkylthio derivatives III. Interaction of II or III with different amines yielded the 3-amino derivatives IV. The 3-hydrazino derivative IVa condensed with aromatic aldehydes
Potentially chemotherapeutic purine analogues. Part V. Some hydrazone derivatives of pyrazole-4,5-diones and their cyclisation to pyrazolo-[3,4-e][1,2,4]triazines
作者:J. H. Lister、D. S. Manners、G. M. Timmis
DOI:10.1039/j39700001313
日期:——
4-Thiosemicarbazones of pyrazole-4,5-diones are prepared by the reaction of thiosemicarbazide with the diones themselves or with 4-p-diethylaminophenylimino-, 4-hydroxyimino-, or 4,4-dibromo-pyrazol-5-one. Cyclisation of 4-thiosemicarbazonopyrazol-5-ones under alkaline conditions leads to pyrazolo [3,4-e][1,2,4]triazine-3-thiols. The latter and their derivatives are of interest as potentiallychemotherapeutic purine
通过使硫代氨基脲与二酮本身或与4-对-二乙基氨基苯基亚氨基-,4-羟基亚氨基-或4,4-二溴-吡唑-5-酮反应来制备吡唑-4,5-二酮的4-硫代氨基甲唑酮。在碱性条件下将4-thiosemicarbazonopyrazol-5-one环化可生成吡唑并[3,4- e ] [1,2,4]三嗪-3-硫醇。后者及其衍生物作为潜在的嘌呤类似物是令人感兴趣的。