Analogue-based design, synthesis and docking of non-steroidal anti-inflammatory agents. Part 2: Methyl sulfanyl/methyl sulfonyl substituted 2,3-diaryl-2,3-dihydro-1H-quinazolin-4-ones
摘要:
A series of methyl sulfanyl/methyl sufonyl substituted 2,3-diaryl-2,3-dihydro-1H-quinazolin-4-one were designed using analogue-based design, scaffold hopping and shape similarity matching. The designed compounds were synthesized in 2-3 steps with simple chemistry and screened by ovine cyclooxygenases (COXs) inhibitory assay and carrageenan-induced rat paw edema assay. Among the screened compounds, two compounds exhibited 100% cyclooxygenase-2 (COX-2) inhibitory potency without showing cycloxygenase-1 (COX-1) inhibition at 20 mu M. The compounds also showed promising in vivo anti-inflammatory potential. A structure-activity relationship within the dataset was established by correlating the effect of aromatic ring substituent constants, structural variables and physico-chemical descriptors with in vivo anti-inflammatory activity. Molecular docking studies were also performed on the title compounds to study the binding interactions to COX-2 active site residues. The experimentally determined COX-2 inhibitory activity was found moderately correlating with binding modes predicted for compounds by Glide XP dock scoring function. The 2,3-diaryl-2,3-dihydro-1H-quinazolin-4-one pharmacophore reported herein should be a new lead for further development of novel non-steroidal anti-inflammatory agents. (C) 2012 Elsevier Ltd. All rights reserved.
1,5-Diarylimidazoles with strong inhibitory activity against COX-2 catalyzed PGE2 production from LPS-induced RAW 264.7 cells
摘要:
A series of 1,5-diarylimidazoles with 4-methylsulfonylphenyl group were prepared and evaluated for the inhibitory activities against COX-2 catalyzed PGE(2) production from LPS-induced RAW 264.7 cells. Most of synthesized 1,5-diarylimidazoles exhibited strong inhibitory activities regardless of the position of the 4-methylsulfonylphenyl group. The 1,5-diarylimidazoles with a halogen atom (3c-3h, 3n-3p) gave mostly excellent inhibitory activities regardless of the position and species of the halogen atom. Whereas the 1,5-diarylimidazoles with two fluorine atoms (3k, 3l, 3r, 3s) showed rather reduced inhibitory activities. (C) 2010 Elsevier Ltd. All rights reserved.