A series of ω-aminoalkoxylxanthones were synthesized and tested in-vitro for their ability to inhibit aggregation of rabbit washed platelets and human platelet-rich plasma (PRP) induced by various inducers. Nine of these compounds showed more potent antiplatelet effects than natural norathyriol tetraacetate on collagen-induced aggregation. The various ω-aminoalkoxyl side chains of the synthesized compounds modified the antiplatelet effects. All the compounds tested in human PRP showed significant inhibition of secondary aggregation induced by adrenaline, suggesting that the antiplatelet effects of these compounds is mainly due to an inhibitory effect on thromboxane formation. These compounds at high concentration also cause vasorelaxing action in rat thoracic aorta.
合成了一系列ω-氨基烷氧基黄酮,并在体外测试了它们抑制兔洗涤血小板和人血小板富集浆(PRP)在不同诱导剂作用下的聚集能力。其中有九种化合物比天然的四乙酰基诺芩醇对胶原诱导的聚集具有更强的抗血小板作用。合成化合物的各种ω-氨基烷氧基侧链修饰了抗血小板作用。在人类PRP中测试的所有化合物都显示出显著的抑制肾上腺素诱导的二次聚集,表明这些化合物的抗血小板作用主要是通过抑制血栓素形成的作用。这些化合物在高浓度下还会在大鼠胸主动脉中产生血管松弛作用。