3-[4-(Methylsulfonyl)phenyl]-5-(trifluoromethyl)(2-pyridyl) Phenyl Ketone as a Potent and Orally Active Cyclooxygenase-2 Selective Inhibitor:  Synthesis and Biological Evaluation

Journal of Medicinal Chemistry
2005.0

Abstract

Incorporation of a spacer group between the central scaffold and the aryl ring resulted in a new cyclooxygenase-2 (COX-2) selective inhibitor core structure, 3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)(2-pyridyl) phenyl ketone (20), with COX-2 IC50 = 0.25 microM and COX-1 IC50 = 14 microM (human whole blood assay). Compound 20 was orally active in the rat air pouch model of inflammation, inhibiting white blood cell infiltration and COX-2-derived PG production. Our data support the identification of a novel COX-2 selective inhibitor core structure exemplified by 20.

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