Drug efficacy of novel 3-O-methoxy-4-halo disubstituted 5,7-dimethoxy chromans; evaluated via DNA gyrase inhibition, bacterial cell wall lesion and antibacterial prospective.

In this study, novel 3-O-methoxy-4-halo, disubstituted-5,7-dimethoxy chromans with bacterial cell wall degrading potentials were synthesized, characterized and evaluated as DNA gyrase inhibitors and antibacterial agents. Compounds were showed a broad spectrum of antimicrobial activity against both Gram+ve bacteria (S. aureus (MTCC 3160), C. diphtheriae (MTCC 116), S. pyogenes (MTCC 442)) and Gram-ve bacteria (E. coli (MTCC 443), P. aeruginosa (MTCC 424), K. pneumoniae (MTCC 530)). Further, a molecular docking study was carried out to get more insight into the binding mode of present study compounds to target proteins (PDB ID: 2XCT (S. aureus DNA gyrase A), PDB ID: 3G75 (S. aureus DNA gyrase B), PDB ID: 3L7L (Teichoic acid polymerase). In the results, 14 > 20 > 24 > 12 > 18 > 17 were found as the most active against almost all executed activities in this study. The predicted Lipinski's filter scores, SAR, pharmacokinetic/pharmacodynamics, and ADMET properties of these compounds envisioned the druggability prospects and the necessity of further animal model evaluations of 3-O-methoxy-4-halo disubstituted 5,7-dimethoxy chromans to establish them as an effective and future antibiotics.