Synthesis and evaluation of platelet aggregation inhibitory activity of some 3-phenyl-pyrroloquinazolinones
作者:Maria Grazia Ferlin、Christian Borgo、Renzo Deana
DOI:10.1016/j.ejmech.2011.12.026
日期:2012.2
derivatives were first tested for their capacity to inhibit platelet aggregation. Some of them had in vitro inhibitory effects on collagen and thrombin-induced aggregation in the micromolar range, and much higher inhibition than that shown by some phenyl-pyrroloquinolinones. Experiments to determine the mechanism of action of the most potent inhibitor (compound 18) indicated that it acts in at least two
从5-氨基吲哚开始,经与N-缩合反应,合成了一系列3-苯基-2,7-二氢-1H-吡咯并[3,2 - f ]喹唑啉-1-酮衍生物(3-PPyQZ)。乙氧基羰基硫代苯甲酰胺,然后进行热环化。基于其与报道的抗凝血酶吡咯并喹唑啉的结构相似性,首先测试了这些衍生物抑制血小板聚集的能力。它们中的一些在微摩尔范围内对胶原蛋白和凝血酶诱导的聚集具有体外抑制作用,并且比某些苯基-吡咯并喹啉酮所显示的抑制作用高得多。实验以确定最有效抑制剂的作用机理(化合物18)表明它在至少两个位点起作用:一个在激动剂诱导的胞质[Ca 2+ ]增加之前,一个在血小板激活级联的这一步骤之后。该化合物还抑制凝血酶诱发的蛋白Tyr-磷酸化。尽管得出明确的结论为时过早,但目前的结果表明,3-PPyQZ结构与血小板聚集化合物18的强效抑制剂可能构成合成潜在抗血栓形成剂的起点。