1,2-Diarylimidazoles as potent, cyclooxygenase-2 selective, and orally active antiinflammatory agents.

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Khanna IK, Weier RM, Yu Y, Xu XD, Koszyk FJ, Collins PW, Koboldt CM, Veenhuizen AW, Perkins WE, Casler JJ, Masferrer JL, Zhang YY, Gregory SA, Seibert K, Isakson PC

1,2-Diarylimidazoles as potent, cyclooxygenase-2 selective, and orally active antiinflammatory agents.

J Med Chem. 1997 May 23;40(11):1634-47.

PubMed ID

9171873 [ View in PubMed

]

Abstract

Series of 1,2-diarylimidazoles has been synthesized and found to contain highly potent and selective inhibitors of the human COX-2 enzyme. The paper describes a short synthesis of the target 1,2-diarylimidazoles starting with aryl nitriles. Different portions of the diarylimidazole (I) were modified to establish SAR. Systematic variations of the substituents in the aryl ring B have yielded very potent (IC50 = 10-100 nm) and selective (1000-12500) inhibitors of the COX-2 enzyme. The study on the influence of substituents in the imidazole ring established that a CF3 group at position 4 gives the optimum oral activity. A number of the diarylimidazoles showed excellent inhibition in the adjuvant induced arthritis model (e.g., ED50 = 0.02 mpk for 22 and 34). The diarylimidazoles are also potent inhibitors of carrageenan-induced edema (ED50 = 9-30 mpk) and hyperalgesia (ED50 = 11-40 mpk). Several orally active diarylimidazoles show no GI toxicity in the rat and mouse up to 200 mpk.

DrugBank Data that Cites this Article

Binding Properties

Drug	Target	Property	Measurement	pH	Temperature (°C)
Indomethacin	Prostaglandin G/H synthase 2	IC 50 (nM)	900	N/A	N/A	Details