C6 modification of the pyridinone core of thrombin inhibitor L-374,087 as a means of enhancing its oral absorption

Article abstract of DOI:10.1016/S0960-894X(98)00297-2

1 (L-374,087) is a potent, selective, efficacious, and orally bioavailable thrombin inhibitor that contains a core 3-amino-2-pyridinone moiety. Replacement of the C6 pyridinone metyl group of 1 by a propyl group gave 5 (L-375,052), which retained all the excellent properties of 1, and also yielded higher plasma levels after oral dosing in dogs and rats.