Rational Design, Synthesis, and Biological Activity of Benzoxazinones as Novel Factor Xa Inhibitors
作者:Danette A. Dudley、Amy M. Bunker、Liguo Chi、Wayne L. Cody、Debra R. Holland、Diane P. Ignasiak、Nancy Janiczek-Dolphin、Thomas B. McClanahan、Thomas E. Mertz、Lakshmi S. Narasimhan、Stephen T. Rapundalo、Julia A. Trautschold、Chad A. Van Huis、Jeremy J. Edmunds
DOI:10.1021/jm000074l
日期:2000.11.1
Inappropriate thrombus formation within blood vessels is the leading cause of mortality in the industrialized world. Factor Xa (FXa) is a trypsin-like serine protease that plays a key role in the blood coagulation cascade and represents an attractive target for anticoagulant drug development, From a high-throughput in vitro mass screen of our chemical library, we identified 4-[5-[(2R,6S)-2,6-dimethyltetrahydro-1(2H)-pyridinyl]pentyl]-2-phenyl-2H-1,4-benzoxazin-3(4H)-one (1a) as an inhibitor of FXa with an IC50 of 27 muM. Through a combination of SAR studies and molecular modeling, we synthesized 3-(4-[5-[(2R,6S)-2,6-dimethyltetrahydro-1(2N)-pyridinyl]pentyl]-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl)-1-benzenecarboximidamide (1n) which was a potent FXa inhibitor with an IC50 of 3 nM. This compound exhibited high selectivity for FXa over other related serine proteases and was efficacious when dosed intravenously in rabbit and dog antithrombotic models.