Design, synthesis, and crystal structure of selective 2-pyridone tissue factor VIIa inhibitors.
Targeted 2-pyridones were selected as tissue Factor VIIa inhibitors and prepared from 2,6-dibromopyridine via a multistep synthesis. A variety of chemical transformations, including regioselective nucleophilic addition, selective nitrogen alkylation, and a Suzuki coupling, afforded the targeted tissue Factor VIIa inhibitors. The pyridone core was selected as a replacement for the pyrazinone core of noncovalent tissue Factor VIIa inhibitors and designed such that their substitution pattern would occupy and interact with the S(1), S(2), and S(3) pockets of the tissue Factor VIIa enzyme. These compounds were tested in several serine protease enzyme assays involved in the coagulation cascade exhibiting modest activity on tissue Factor VIIa with excellent selectivity over thrombin and Factor Xa. Finally, an X-ray crystal structure of inhibitor 14a bound to tissue Factor VIIa was obtained and will be described.
Parlow
John J
JJ
Department of Medicinal and Combinatorial Chemistry, Pharmacia Corporation, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, USA. john.j.parlow@pfizer.com
Kurumbail
Ravi G
RG
Stegeman
Roderick A
RA
Stevens
Anna M
AM
Stallings
William C
WC
South
Michael S
MS
D000081:Acetamides / Q000138:chemical synthesis* / Q000737:chemistry; D001565:Benzoates / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D015195:Drug Design; D015942:Factor VIIa / Q000037:antagonists & inhibitors*; D006801:Humans; D008958:Models, Molecular; D011480:Protease Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry; D011728:Pyridones / Q000138:chemical synthesis* / Q000737:chemistry; D013329:Structure-Activity Relationship
C478621:3-amino-5-(1-(2-((4-(amino(imino)methyl)benzyl)amino)-2-oxoethyl)-5-(isopropylamino)-6-oxo-1,6-dihydropyridin-2-yl)benzoic acid; D000081:Acetamides; D001565:Benzoates; C478622:N-(4-(amino(imino)methyl)benzyl)-2-(6-(3,5-diaminophenyl)-3-(isopropylamino)-2-oxopyridin-1(2H)-yl)acetamide; D011480:Protease Inhibitors; D011728:Pyridones; C017679:2-hydroxypyridine; D015942:Factor VIIa