Orally Active Fibrinogen Receptor Antagonists. 2. Amidoximes as Prodrugs of Amidines
作者:Thomas Weller、Leo Alig、Maureen Beresini、Brent Blackburn、Stuart Bunting、Paul Hadváry、Marianne Hürzeler Müller、Dietmar Knopp、Bernard Levet-Trafit、M. Terry Lipari、Nishit B. Modi、Marcel Müller、Canio J. Refino、Monique Schmitt、Peter Schönholzer、Sabine Weiss、Beat Steiner
DOI:10.1021/jm9509298
日期:1996.1.1
thrombotic occlusions, orally active inhibitors are needed. By means of a prodrug strategy, the modest oral absorption of 1 in mice was improved by a factor of 9. In addition, these studies demonstrated that an amidoxime group can serve as a prodrug functionality for an amidino group. Application of this principle to the structurally related amidino carboxylate 13 led to the amidoxime ester 18 which was absorbed
强效和选择性GP IIb-IIIa拮抗剂lamifiban(1,Ro 44-9883)目前正在临床开发中,作为可注射的抗血栓药来治疗和预防急性冠状动脉综合征。但是,对于血栓闭塞的二级预防,需要口服活性抑制剂。通过前药策略,小鼠中适度的口服吸收1改善了9倍。此外,这些研究表明a胺肟基团可作为ino胺基团的前药功能。将此原理应用到与结构相关的a基羧酸盐13上,可导致oral胺肟酯18在口服给小鼠后比13吸收约好20倍。由于the基和羧酸盐基团的修饰,18完全丧失了与纯化的血小板GP IIb-IIIa相互作用的能力。对大鼠,狗和恒河猴口服18后,活性衍生物13的生物利用度分别为26 +/- 5、25 +/- 6和33 +/- 6%,消除半衰期分别为4.1 +/- 1.7、11.4 +/- 1.1和5.1 +/- 1.4小时。根据这些特性,选择口服有效成分18(Ro 48-3657)(有效的和选择性的非肽GP