Novel Antagonists of Platelet-Activating Factor. 2. Synthesis and Structure-Activity Relationships of Potent and Long-Acting Heterofused [1,5]Benzodiazepine and [1,4]Diazepine Derivatives of 1-Phenyl-2-methylimidazo[4,5-c]pyridine
作者:M. Jonathan Fray、David J. Bull、Kelvin Cooper、M. John Parry、Mark H. Stefaniak
DOI:10.1021/jm00018a012
日期:1995.9
described for three novel structural types of platelet-activating factor (PAF) antagonist: [1,5]benzodiazepines 5-12 onto which a variety of other heterocyclic rings were fused, pyrido[2,3-b][1,4]-diazepinones 13-26, and pyrazolo[3,4-b][1,4]diazepinones 27-46. Compounds 5-12 were prepared by elaboration of the [1,5]benzodiazepine-2-thiones 47 and 48, and 13-46 were prepared by cyclocondensation reactions
针对血小板活化因子(PAF)拮抗剂的三种新型结构类型,描述了体外活性,口服药效和体内作用时间的优化:[1,5]苯并二氮杂5-12,其上还带有多种其他杂环稠合的吡啶并[2,3-b] [1,4]-二氮杂酮13-26和吡唑并[3,4-b] [1,4]二氮杂酮27-46。化合物5-12通过精制[1,5]苯并二氮杂-2-硫酮47和48制备,而13-46通过多种2,3-二氨基吡啶和4,5-二氨基吡唑衍生物与4′-(2-甲基咪唑并[4,5-c]吡啶-1-基)苯甲酰基乙酸乙酯(53)。在某些二氮杂衍生物中观察到亚胺-烯胺互变异构现象的存在并进行了讨论。评估了结构活性关系,其中通过测定抑制PAF诱导的兔洗涤血小板聚集所需的化合物浓度(IC50)在体外测量PAF拮抗剂活性,并通过确定保护小鼠免于口服的口服剂量(ED50)在体内测量PAF拮抗剂活性。致命注射PAF。另外,通过确定完全抑制离体PAF诱导的全血聚集