Access to the 2,3-dihydropyridazin-3-one and<i>as</i>-triazino[3,4-<i>a</i>]phthalazine ring systems from 4-aryl-2-oxo-butanoic acids
作者:El-Sayed H. El-Ashry、Adel Amer、George H. Labib、Mohamed M. Abdel Rahman、Abdel Monem El-Massry
DOI:10.1002/jhet.5570240114
日期:1987.1
ituted phenacyl)-2-butenoic acids 10. Condensation reaction of 10 with hydrazines gave type 15 compounds in good yields. Also, a new series of as-triazino[3,4-a]phthalazines 20 was obtained from the reaction of substituted benzylpyruvic acids 6 with hydralazine to give the hydralazones 19 which underwent dehydrative cyclization reaction with PPA to afford 20. Structure assignments are based on 1H,
通过肼与4-(对氯苯基)-2-羟基-2-(2-氧代-2-取代的乙基)丁酸8的缩合反应合成了一系列新的2,3-二氢哒嗪-3-酮15。然后通过取代的苄基丙酮酸6与甲基烷基(芳基)酮的反应制备7。用冰醋酸和盐酸的混合物将8b-d脱水,得到4-(对-氯苯基)-2-(取代的苯甲酰基)。 -2-丁烯酸10. 10与肼的缩合反应以高收率得到15型化合物。另外,新系列的因为-三嗪[3,4- a ]酞嗪20是从取代的苄基丙酮酸6与肼苯哒嗪反应制得的,以酰肼19形式与PPA进行脱水环化反应得到20。结构分配基于1 H,13 C核磁共振和红外光谱。