In a search for new inhibitors of platelet aggregation, certain coumarin-bearing α-methylene-γ-butyrolactones were synthesized and evaluated for inhibitory activity against thrombin (Thr)-, arachidonic acid (AA)-, collagen (Col)-, and platelet-activating factor (PAF)-induced aggregation in washed rabbit platelets. These compounds were efficiently synthesized from commercially available 7-hydroxycoumarin or its derivative. Among them, 7-[(2, 3, 4, 5-tetrahydro-4-methylene-5-oxo-2-phenyl-2-furanyl)methoxy]-2H-1-benzopyran-2-one (3d) showed the most potent inhibition of AA- and PAF- induced aggregation, with IC50 values of 3.65 and 16.36μM respectively.
在寻找新的血小板聚集
抑制剂的过程中,合成了某些含
香豆素的α-亚甲基-
γ-丁内酯,并评估其对洗涤兔血小板中由凝血酶(Thr)、
花生四烯酸(
AA)、胶原(Col)和血小板激活因子(PAF)诱导的聚集的抑制活性。这些化合物是从商业可得的7-羟基
香豆素或其衍
生物高效合成的。在这些化合物中,7-[(2, 3, 4, 5-四氢-4-亚甲基-5-氧代-2-苯基-2-
呋喃基)甲氧基]-2H-1-苯并
吡喃-2-酮(3d)显示出对
AA和PAF诱导的聚集最强的抑制作用,其IC50值分别为3.65μM和16.36μM。