Efficacious and Orally Bioavailable Thrombin Inhibitors Based on a 2,5-Thienylamidine at the P1 Position: Discovery of <i>N</i>-Carboxymethyl-<scp>d</scp>-diphenylalanyl-<scp>l</scp>-prolyl[(5-amidino-2-thienyl)methyl]amide
作者:Koo Lee、Cheol Won Park、Won-Hyuk Jung、Hee Dong Park、Sun Hwa Lee、Kyung Ha Chung、Su Kyung Park、O Hwan Kwon、Myunggyun Kang、Doo-Hee Park、Sang Koo Lee、Eunice E. Kim、Suk Kyoon Yoon、Aeri Kim
DOI:10.1021/jm030025j
日期:2003.8.1
enzyme in the blood coagulation, has been a target for antithrombotic therapy. Orally active thrombin inhibitors would provide effective and safe prophylaxis for venous and arterial thrombosis. We conducted optimization of a highly efficacious benzamidine-based thrombin inhibitor LB30812 (3, K(i) = 3 pM) to improve oral bioavailability. Of a variety of arylamidines investigated at the P1 position,
凝血酶是凝血中的关键酶,一直是抗血栓治疗的目标。口服活性凝血酶抑制剂可为静脉和动脉血栓形成提供有效和安全的预防。我们对高效的基于苯甲am的凝血酶抑制剂LB30812(3,K(i)= 3 pM)进行了优化,以提高口服生物利用度。在P1位置研究的各种芳基idine胺中,2,5-噻吩基idine胺有效替代了苯amam,而不会损害凝血酶的抑制作用和口服吸收。通常,在N末端位置进行磺酰胺和磺酰胺衍生化可提供高效的凝血酶抑制剂,但具有适度的口服吸收,而可吸收性强的N-氨基甲酸酯衍生物在S9馏分中的代谢稳定性有限。目前的工作最终是发现含有N-羧甲基和2,5-噻吩啶的化合物22,该化合物表现出最有利的抗凝血和抗血栓形成活性以及口服生物活性(K(i)= 15 pM; F =在大鼠,狗和猴子中分别为43%,42%和15%)。在大鼠和兔子的静脉血栓形成模型中,以重量计,该化合物显示出比低分子量肝素依诺肝素更有效