Abstract
Novel 4,5-diarylspiro[2.4]hept-5-enes, 6,7-diarylspiro[3.4]oct-6-enes, and 2,3-diarylspiro[4.4]non-2-enes have been synthesized and shown to be very potent inducible cyclooxygenase (COX-2) inhibitors with inhibition (IC 50) in the low nanomolar range and enzyme selectivity ratios as high as four orders of magnitude. The methyl sulfone spiro[2.4]hept-5-ene 1 (SC-58451) was found to be orally active (ED 50 = 0.3 mpk) in the rat adjuvant-induced arthritis model with no gastric lesions observed at 200 mpk.
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