Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2001-04-04
2004-02-17
Raymond, Richard L. (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C514S241000, C514S252010, C514S252100, C514S256000, C546S291000, C544S194000, C544S238000, C544S323000, C544S328000, C544S330000, C544S407000
Reexamination Certificate
active
06693121
ABSTRACT:
FIELD OF THE INVENTION
This invention is in the field of anticoagulant therapy, and specifically relates to compounds, compositions and methods for preventing and treating thrombotic conditions such as coronary artery and cerebrovascular disease. More particularly, the invention relates to polycyclic aryl and heteroaryl substituted 4-pyridone compounds that inhibit serine proteases of the coagulation cascade.
BACKGROUND OF THE INVENTION
Physiological systems control the fluidity of blood in mammals [Majerus, P. W. et al: Anticoagulant, Thrombolytic, and Antiplatelet Drugs. In Hardman, J. G. and Limbird, L. E., editors: Goodman & Gilman's The Pharmacological Basis of Therapeutics. 9th edition. New York, McGraw-Hill Book Co., 1996, pp. 1341-1343]. Blood must remain fluid within the vascular systems and yet be able to undergo hemostasis, cessation of blood loss from a damaged vessel, quickly. Hemostasis or clotting begins when platelets first adhere to macromolecules in subendothelian regions of an injured and/or damaged vessels. These platelets aggregate to form the primary hemostatic plug and stimulate local activation of plasma coagulation factors leading to generation of a fibrin clot that reinforces the aggregated platelets.
Plasma coagulation factors include factors II, V, VII, VIII, IX, X, XI, and XII; these are also called protease zymogens. These coagulation factors or protease zymogens are activated by serine proteases leading to coagulation in a so called “coagulation cascade” or chain reaction [Handin, R. I.: Bleeding and Thrombosis. In Wilson, J., et al. editors: Harrison's Principles of Internal Medicine. 12th Edition, New York, McGraw-Hill Book Co., 1991,p.350]. Coagulation or clotting occurs in two ways through different pathways. An intrinsic or contact pathway leads from XII to XIIa to XIa to IXa and to the conversion of X to Xa. Xa with factor Va converts prothrombin (II) to thrombin (IIa) leading to conversion of fibrinogen to fibrin. Polymerization of fibrin leads to a fibrin clot. An extrinsic pathway is initiated by the conversion of coagulation factor VII to VIa by Xa. The presence of Tissue Factor and VIIa accelerates formation of Xa in the presence of calcium ion and phospholipids. Formation of Xa leads to thrombin, fibrin, and a fibrin clot as described above. The presence of one or more of these many different coagulation factors and two distinct pathways of clotting could enable the efficacious, selective control and better understanding of parts of the coagulation or clotting process.
While clotting as a result of an injury to a blood vessel is a critical physiological process for mammals such as man, clotting can also lead to disease states. A pathological process called thrombosis results when platelet aggregation and/or a fibrin clot blocks (i.e., occludes) a blood vessel. Arterial thrombosis may result in ischemic necrosis of the tissue supplied by the artery. When the thrombosis occurs in a coronary artery, a myocardial infarction or heart attack can result. A thrombosis occurring in a vein may cause tissues drained by the vein to become edematous and inflamed. Thrombosis of a deep vein may be complicated by a pulmonary embolism. Preventing or treating clots in a blood vessel may be therapeutically useful by inhibiting formation of blood platelet aggregates, inhibiting formation of fibrin, inhibiting thrombus formation, inhibiting embolus formation, and for treating or preventing unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, ocular build up of fibrin, and reocclusion or restenosis of recanalized vessels.
There have been several reports of non-peptidic and peptidic 2-pyridone compounds that act as an inhibitor of a coagulation factor present in the coagulation cascade or clotting process. In U.S. Pat. No. 5,668,289, Sanderson et al. describe 6-alkyl, 6-cycloalkyl, and 6-trifluoromethyl 2-pyridones unsubstituted at the 4 and 5 positions and reported to inhibit thrombin. In PCT Patent Application WO 97/01338, Sanderson et al. describe 6-alkyl, 6-cycloalkyl, and 6-trifluoromethyl 2-pyridones unsubstituted at the 4 and 5 positions and reported to inhibit thrombin. In U.S. Pat. No. 5,792,779, Sanderson et al. describe substituted 4,6-alkyl, 4,6-cycloalkyl, and 4,6-trifluoromethyl 2-pyridones having utility as thrombin inhibitors. In PCT Patent Application WO 97/30708, Sanderson et al. describe additional substituted 4,6-alkyl, 4,6-cycloalkyl, and 4,6-trifluoromethyl 2-pyridones having utility as thrombin inhibitors. In U.S. Pat. No. 5,869,487, Coburn et al. describe pyrido[3,4-B]pyrazines pyrazines containing a fused 6-methyl-2-pyridone functionality and having utility as thrombin inhibitors. In PCT Patent Application WO 98/47876, Van Boeckel et al. describe 6-alkyl-2-pyridones as anti-thrombotic compounds. In PCT Patent Application WO 98/16547, Zhu and Scarborough describe 4,5,6-substituted-3-amino-2-pyridonylacetamides containing amide substituents having a heteroaroyl functions and having activity against mammalian factor Xa. In U.S. Pat. No. 5,656,645, Tamura et al. describe 4,5,6-substituted-3-amino-2-pyridonyl-acetamides containing amide substituents having a formyl function and having activity against thrombin. In U.S. Pat. No. 5,658,930, Tamura et al. again describe 4,5,6-substituted-3-amino-2-pyridonyl-acetamides containing amide substituents having a formyl function and having activity against thrombin. In PCT Patent Applications 96/18644, Tamura et al. further describe 4,5,6-substituted-3-amino-2-pyridonylacetamides containing amide substituents having a formyl function and having activity against thrombin. In PCT Patent Application WO 98/31670, Sanderson et al. describe additional 4-substituted 6-alkyl, 6-cycloalkyl, and 6-trifluoromethyl pyridones having utility as thrombin inhibitors. In PCT Patent Application WO 98/17274, Coburn et al. disclose substituted 3,4-diamino-6-methyl-2-pyridones having utility as human thrombin inhibitors. In PCT Patent Application WO 98/42342, Isaacs et al. describe additional 6-alkyl, cycloalkyl, and trifluoromethyl substituted 2-pyridones reported to inhibit human thrombin. In PCI Patent Applications WO 00/039102, Wexler et al. describe certain 4,6-disubstituted-2-pyridonylacetamides that are further substituted at the 3-position by several groups including several substituted aminos and that are reported to be inhibitors of trysin-like serine protease enzymes, especially factor Xa and thrombin.
In contrast to the disclosures that some 2-pyridone derivatives may function as thrombin inhibitors, 4-pyridonyl compounds, compositions thereof, their use for preventing and treating thrombotic conditions such as coronary artery and cerebrovascular disease, and their ability to inhibit serine proteases of the coagulation cascade have not been previously disclosed.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide novel compounds that are beneficial in anticoagulant therapy and that have a general structure:
It is another object of the present invention to provide methods for preventing and treating thrombotic conditions, such as coronary artery disease, cerebrovascular disease, and other coagulation related disorders. Such thrombotic conditions are prevented and treated by administering to a patient in need thereof an effective amount of compounds of Formula (I).
Various other objects and advantages of the present invention will become apparent from the following description of the invention.
DESCRIPTION OF THE INVENTION
The present invention relates to a class of compounds comprising Polycyclic Aryl and Heteroaryl Substituted 4-pyridones, which are beneficial in anticoagulant therapy for the treatment and prevention of a variety of thrombotic conditions including coronary artery and cerebrovascular disease, as given in Formula (I):
or a pharmaceutically acceptable salt thereof, wherein;
B
Koeller Kevin J.
Ma Chun C.
Neumann William L.
Rahman Hayat K.
South Michael S.
Balasubramanian Venkataraman
Pharmacia Corporation
Raymond Richard L.
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