New heterocyclic syntheses from hydrazidoyl halides. Convenient syntheses of fused pyrimidines, pyridazines, and quinazolines
作者:Abdou O. Abdehamid、Cyril PÁrkÁnyi、Ahmad S. Shawali、Magda A. Abdalla
DOI:10.1002/jhet.5570210425
日期:1984.7
Aminocyanopyrazole derivatives and pyrazolo[2,3-a]quinazolones were obtained in good yields from hydrazidoyl halides and malononitrile. Pyrazolo[3,4-d]pyridazine and pyridazo[4′,5′: 1,2]pyrazolo[1,5-a]quinazoline derivatives were synthesized in quantitative yields by reaction of hydrazine hydrate with 2 and 16, respectively. A novel ring system, a 3-substituted tetrahydro derivative of 7-oxo-6H,8H-pyridazo[3′
氨基氰基吡唑衍生物和吡唑并[2,3- a ]喹唑酮类从酰肼基卤化物和丙二腈中以良好的产率获得。通过水合肼与2和16的反应分别定量合成吡唑并[3,4- d ]哒嗪和哒唑并[4',5':1,2,]吡唑并[1,5- a ]喹唑啉衍生物。制备了一种新型的环体系,即7-氧代-6 H,8 H-吡啶唑[ 3',4',5'- c'd' ]-吡唑并[3,4- d ]嘧啶的3-取代四氢衍生物。通过6与碳酸二甲酯的反应。吡唑啉[3,4- d通过2与二硫化碳反应以高收率获得]嘧啶-4,6-二硫酮。根据产品的元素分析,光谱数据和可能的合成方法,对产品的结构进行分配和确认。方案1总结了本工作中讨论的母体稠合杂环系统的结构。