Pyridazine Derivatives and Related Compounds, Part 9. Tetrazolo[1,5-b]pyridazine-8-carbohydrazide Synthesis and Some Reactions
作者:Ali Deeb、Hosam Saad
DOI:10.3987/com-03-9749
日期:——
7-diphenyltetrazolo[1,5-b]pyridazine-8-carboxylic acid (3) with aromatic aldehydes gave 8-arylidenecarbohydrazide derivatives. The reaction of 3 with methanesulfonyl chloride, benzenesulfonyl chloride, phenyl and benzyl isothiocyanates afforded the corresponding N-substituted derivatives. The reaction of 3 with potassium ethylxanthate gave 5-(6,7-diphenyltetrazolo[1,5-blpyridazin-8-yl)-1,3,4-oxadiazole-2-thione
6,7-二苯基四唑并[1,5-b]哒嗪-8-羧酸(3)的酰肼与芳香醛反应得到8-亚芳基碳酰肼衍生物。3与甲磺酰氯、苯磺酰氯、苯基和异硫氰酸苄酯反应得到相应的N-取代衍生物。3 与乙基黄原酸钾反应得到 5-(6,7-二苯基四唑并[1,5-blpyridazin-8-yl)-1,3,4-oxadiazole-2-thione (7)。该产物在碱性介质中的烷基化在硫原子处进行,而氨甲基化和酰化在氮原子处进行。化合物(3)也与N-氨基氨基硫脲反应得到4-氨基-5-(6,7-二苯基-四唑并[1,5-b]哒嗪-8-基)-1,2,4-三唑-3-硫酮 (11)。