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Bioorg Med Chem Lett. 2003 Feb 10;13(3):369-73.

Nonbenzamidine tetrazole derivatives as factor Xa inhibitors.

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Bristol-Myers Squibb Co., PO Box 80500, Wilmington, DE 19880-0500, USA.


Factor Xa (fXa) is an important serine protease that holds the central position linking the intrinsic and extrinsic activation mechanisms in the blood coagulation cascade. Therefore, inhibition of fXa has potential therapeutic applications in the treatments of both arterial and venous thrombosis. Herein we describe a series of tetrazole fXa inhibitors containing benzamidine mimics as the P(1) substrate, of which the aminobenzisoxazole moiety was found to be the most potent benzamidine mimic. SR374 (12) inhibits fXa with a K(i) value of 0.35 nM and is very selective for fXa over thrombin and trypsin.

[Indexed for MEDLINE]

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