Studies on Antiplatelet Agents. I. Synthesis and Platelet Inhibitory Activity of 5-Alkyl-2-aryl-4-pyridylimidazoles.
作者:Akito TANAKA、Kiyotaka ITO、Shigetake NISHINO、Yukio MOTOYAMA、Hisashi TAKASUGI
DOI:10.1248/cpb.40.3206
日期:——
5-Alkyl-2-aryl-4-pyridylimidazoles were synthesized and tested in rat ex vivo platelet aggregation studies. Among these compounds, 2-(2-fluorophenyl)-5-methyl-4-(3-pyridyl)imidazole (25) was most potent, and showed 98% inhibition at a dose of 10 mg/kg (p.o.). 25 had inhibitory activity on cyclooxygenase, thromboxane A2 (TXA2) synthetsase, and phosphodiesterase, and also showed inhibited KCl-induced contraction of rat aorta. All compounds have little acute toxicity and appear to be free of adverse effects on the stomach.
合成了5-烷基-2-芳基-4-吡啶基咪唑并在大鼠体外血小板聚集实验中进行了测试。在这些化合物中,2-(2-氟苯基)-5-甲基-4-(3-吡啶基)咪唑(25)最为活跃,在10 mg/kg(口服)剂量下显示出98%的抑制效果。25对环氧酶、血栓素A2(TXA2)合成酶和磷酸二酯酶均具有抑制活性,并且抑制了氯化钾诱导的大鼠主动脉收缩。所有化合物的急性毒性很小,似乎没有对胃造成不良影响。