Synthesis and Biological Evaluation of Direct Thrombin Inhibitors Bearing 4-(Piperidin-1-yl)pyridine at the P1 Position with Potent Anticoagulant Activity
作者:Modesto de Candia、Filomena Fiorella、Gianfranco Lopopolo、Andrea Carotti、Maria Rosaria Romano、Marcello Diego Lograno、Sophie Martel、Pierre-Alain Carrupt、Benny D. Belviso、Rocco Caliandro、Cosimo Altomare
DOI:10.1021/jm401169a
日期:2013.11.14
(fIIa) and factor Xa (fXa) inhibition activities, anti-fIIa activity and artificial membrane permeability were considerably improved by optimizing the basic P1 and the X-substituted phenyl P4 binding moieties. Structure–activity relationship studies, usefully complemented with molecular modeling results, led us to identify compound 13b, which showed excellent fIIa inhibition (Ki = 6 nM), weak anti-Xa
描述了一种新型的非肽类直接凝血酶抑制剂的设计和合成,该抑制剂建立在1-(吡啶-4-基)哌啶-4-羧酰胺的结构上。从显示弱的凝血酶(fIIa)和Xa因子(fXa)抑制活性的强碱性1- ami基哌啶衍生物(6)开始,通过优化碱性P1和X-取代的苯基P4可显着提高抗fIIa活性和人工膜通透性结合部分。结构-活性关系研究以及有用的分子建模结果使我们得以鉴定出化合物13b,该化合物表现出出色的fIIa抑制作用(K i = 6 nM),抗Xa活性弱(K i= 5.64μM),并且对其他丝氨酸蛋白酶(例如胰蛋白酶)具有显着的选择性。化合物13b在低微摩尔范围内显示出体外抗凝活性,并具有显着的膜通透性。在小鼠中(离体),13b在口服给药(100 mg·kg –1)后2 h表现出抗凝作用,与对照组相比,活化的部分凝血活酶时间(aPTT)延长了43%(P <0.05)。