Structure-Based Design of Potent, Amidine-Derived Inhibitors of Factor Xa: Evaluation of Selectivity, Anticoagulant Activity, and Antithrombotic Activity
摘要:
To enhance the potency of 1,2-dibenzamidobenzene-derived inhibitors of factor Xa (fXa), an amidine substituent was incorporated on one of the benzoyl side chains to interact with Asp189 in the S1 specificity pocket. Lead molecule 1 was docked into the active site of Ma to facilitate inhibitor design. Subsequently, iterative SAR studies and molecular modeling led to a 1000-fold increase in Ma affinity and a refined model of the new inhibitors in the Ma active site. Strong support for the computational model was achieved through the acquisition of an X-ray crystal structure using thrombin as a surrogate protein. The amidines in this series show high levels of selectivity for the inhibition of Ma relative to other trypsin-like serine proteases. Furthermore, the Ma affinity of compounds in this series (K-ass = 50-500 x 10(6) L/mol) translates effectively into both anticoagulant activity in vitro and antithrombotic activity in vivo.
(EN) This application relates to a compound of formula (I) (or a prodrug thereof or a pharmaceutically acceptable salt of the compound or prodrug thereof) as defined herein, pharmaceutical compositions thereof, and its use as an inhibitor of factor Xa, as well as a process for its preparation and intermediates therefor.(FR) Cette invention traite d'un composé de la formule (I), telle que définie dans le descriptif, (ou bien d'un promédicament de ce composé ou bien d'un sel pharmaceutiquement acceptable de ce composé ou d'un promédicament de ce composé), de compositions pharmaceutiques contenant ce composé, de l'utilisation de ce composé en tant qu'inhibiteur du facteur Xa, d'un procédé permettant de préparer ce composé et d'intermédiaires utilisés pour produire ledit composé.