Discovery of a Potent Parenterally Administered Factor XIa Inhibitor with Hydroxyquinolin-2(1H)-one as the P2′ Moiety
摘要:
Structure-activity relationship optimization of phenylalanine P1' and P2' regions with a phenylimidazole core resulted in a series of potent FXIa inhibitors. Introducing 4-hydroxyquinolin-2-one as the P2' group enhanced FXIa affinity and metabolic stability. Incorporation of an N-methyl piperazine amide group to replace the phenylalanine improved both FXIa potency and aqueous solubility. Combination of the optimization led to the discovery of FXIa inhibitor 13 with a FXIa K-i of 0.04 nM and an aPTT EC2x of 1.0 mu M. Dose-dependent efficacy (EC50 of 0.53 mu M) was achieved in the rabbit ECAT model with minimal bleeding time prolongation.
ARYLPROPIONAMIDE, ARYLACRYLAMIDE, ARYLPROPYNAMIDE, OR ARYLMETHYLUREA ANALOGS AS FACTOR XIA INHIBITORS
申请人:Pinto Donald J.P.
公开号:US20100022506A1
公开(公告)日:2010-01-28
The present invention provides compounds of Formula (I):
or a stereoisomer, tautomer, pharmaceutically acceptable salt or solvate form thereof, wherein the variables A, L
1
, M and R
11
are as defined herein. The compounds of Formula (I) are selective inhibitors of serine protease enzymes of the coagulation cascade and/or contact activation system; for example thrombin, factor Xa, factor XIa, factor IXa, factor VIIa and/or plasma kallikrein. In particular, it relates to compounds that are selective factor XIa inhibitors or dual inhibitors of fXIa and plasma kallikrein. This invention also relates to pharmaceutical compositions comprising these compounds and methods of treating thromboembolic and/or inflammatory disorders using the same.