Design, Synthesis and Evaluation of Chalcone Derivatives as Anti-Inflammatory, Antioxidant and Antiulcer Agents

In the present study, a series of chalcone derivatives were designed based on QSAR analysis. The designed compounds were synthesized by Claisen Schmidt condensation and evaluated for anti-inflammatory, antioxidant and antiulcer activities. The results of the best 2D & 3D QSAR models suggested that by introducing electron releasing groups at R-2 and introducing heteroatom with increasing bulkiness at R-4 in the benzylideneacetophenone nucleus will increase the activity. The structures of the compounds were established by IR, H-1 NMR and mass spectral analysis. All the compounds were evaluated for their anti-inflammatory (carrageenan-induced rat paw edema assay), antioxidant (inhibition of lipid peroxidation) and antiulcer activity (indomethacin-induced gastric damage). Of 10 compounds screened, compounds 1e and 1d exhibited promising anti-inflammatory activity with 68-70% inhibition at 100mg/kg , inhibition of lipid peroxidation with IC50 2.47 & 3.1 mu g/ml respectively. The Compounds 1e, 1j and 1d exhibited good gastro protective action as indicated by their low ulcer score. Overall, 1e was obtained as lead compound with promising anti-inflammatory, antioxidant and antiulcer activities.