Reactions of 3-acetyl- and 3-acetimidoyl-5,6,7,8-tetrafluoro-4-hydroxycoumarins with substituted hydrazines
作者:K. V. Shcherbakov、Ya. V. Burgart、V. I. Saloutin
DOI:10.1007/s11172-009-0166-4
日期:2009.6
benzopyrano[2,3-c]pyrazol-4-ones, depending on nucleophilicity of the diamine and the nature of the solvent used. In the reaction with phenylhydrazine, the formation of 1-phenyl-3H-pyrazol-3-one derivative is also possible, and in the reaction with methylhydrazine, the formation of 7-methylhydrazinobenzopyrano[2,3-c]pyrazolone, too.
摘要3-乙酰基-和3-乙酰亚氨基-5,6,7,8-四氟-4-羟基香豆素与甲基-和苯肼反应,在酰基取代基处生成缩合产物,即5,6,7,8-四氟-3 -(1-肼基)亚乙基苯并吡喃-2,4-二酮,或再循环产物,即6,7,8-三氟-5-羟基苯并吡喃[2,3-c]吡唑-4-酮,取决于二胺的亲核性以及所用溶剂的性质。与苯肼反应生成1-苯基-3H-吡唑-3-酮衍生物,与甲基肼反应生成7-甲基肼基苯并吡喃并[2,3-c]吡唑啉酮。