Benzoylpyridines and benzophenones were synthesized and evaluated in vitro as p38alpha inhibitors and in vivo in several models of rheumatoid arthritis. Oral activity was found to depend upon substitution: 1,1-dimethylpropynylamine substituted benzophenone 10b (IC50: 14 nM) and pyridinoyl substituted benzimidazole 17b (IC50: 21 nM) showed highest efficacy and selectivity with ED50s of 9.5 and 8.6 mg/kg p.o. in CIA.
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| http://dx.doi.org/10.1016/j.bmcl.2004.03.111 | DOI Listing |
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