A series of novel 2,3-diaryl-2-cyclobuten-1-ones have been synthesized
and have been evaluated with respect to their ability to inhibit the
isozymes of cyclooxygenase, COX-I and COX-2. 4,4-Dimethyl-2-phenyl-3-
[4-(methylsulfonyl)phenyl]cyclobutenone 22 was found to be highly sele
ctive for inhibition of COX-2 and was orally active (ED(50) = 2.4 mg/k
g) in the rat paw edema model. Copyright (C) 1996 Elsevier Science Ltd