New platelet activating factor (PAF) antagonists, 3 were synthesized by replacing the charged phosphate and trimethylammonium moieties with sulfonamide and heterocyclic quarternary ammonium functionalities, respectively(PAF-sulfonamide isosteres). Darmstoff phosphatidic acid analogues of this class (Darmstoff-sulfonamide isosteres), 6 were also synthesized.The activity of these compounds as PAF antagonists was evaluated from their in vitro inhibitory effect on PAF-induced platelet aggregation in rabbit platelet-rich plasma. Among the compounds tested, some of the 2-methoxypropane derivatives with an octadecylcarbamoyloxy or octadecylcarbamoylthio side chain at the 1-position and a propylsulfonamide function bearing a terminal polar substituent such as a quarternary quinolinium or substituted quinolinium group at the 3-position were found to be the most potent (IC50=0.3-0.6μM).
通过分别用磺酰胺和杂环季
铵官能团取代带电的
磷酸盐和三甲基
铵,合成了新的血小板活化因子(PAF)拮抗剂 3(PAF-磺酰胺异构体)。这些化合物作为 PAF 拮抗剂的活性是通过它们对 PAF 诱导的兔血小板富集血浆中血小板聚集的体外抑制作用来评估的。在测试的化合物中,一些
2-甲氧基丙烷衍
生物的 1 位具有
十八烷基
氨基甲酰氧基或
十八烷基
氨基甲酰
硫代侧链,3 位具有丙磺酰胺功能并带有末端极性取代基(如四元
喹啉基或取代的
喹啉基),这些化合物的效力最强(IC50=0.3-0.6μM)。