1,4-Dihydropyridines as antagonists of platelet activating factor. 1. Synthesis and structure-activity relationships of 2-(4-heterocyclyl)phenyl derivatives
作者:Kelvin Cooper、M. Jonathan Fray、M. John Parry、Kenneth Richardson、John Steele
DOI:10.1021/jm00095a005
日期:1992.8
A novel class of 2-(4-heterocyclylphenyl)-1,4-dihydropyridines (2-38) possessing antagonist activity against platelet activating factor (PAF) was prepared by the Hantzsch synthesis from a variety of ethyl 4'-heterocyclic-substituted benzoylacetates, aryl or heteroaryl aldehydes, and substituted 3-aminocrotonamides or 3-aminocrotonate esters. Structure-activity relationships were evaluated where PAF
利用多种4'-杂环取代的苯甲酰乙酸乙酯通过Hantzsch合成方法制备了一类对血小板活化因子(PAF)具有拮抗活性的2-(4-杂环基苯基)-1,4-二氢吡啶(2-38) ,芳基或杂芳基醛,以及取代的3-氨基巴豆酰胺或3-氨基巴豆酸酯。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的口服剂量(ED50)在体内测量PAF拮抗剂活性致命注射PAF。发现二氢吡啶2位上的取代基对于体外和体内活性均很重要,而4位和5位的结构变化具有更大的灵活性。最有效的化合物是4-(2-氯苯基)-1,4-二氢-3-(乙氧羰基)-6-甲基-2- [4-(2-甲基咪唑并[4,5-c]吡啶-1-基)苯基] -5- [N-(2-吡啶基)氨基甲酰基]吡啶(17,UK-74,505),IC50 = 4.3 nM,ED50 = 0.26 mg