Design, synthesis, antibacterial activity and physicochemical parameters of novel N-4-piperazinyl derivatives of norfloxacin
作者:Gamal El-Din A.A. Abuo-Rahma、Hatem. A. Sarhan、Gamal F.M. Gad
DOI:10.1016/j.bmc.2009.04.027
日期:2009.6
We report herein the synthesis of some N-Mannich bases in addition to different N-4 substituents of norfloxacin. The antibacterial activities of the newly synthesized compounds were evaluated and correlated with their physicochemical properties. Results revealed that some of the tested compounds exhibited better inhibitory activities than the reference antibiotic norfloxacin against Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumonia and Staphylococcus aureus strains. Correlation results showed that there is no single physicochemical parameter that can determine the effect of N-4 piperazinyl group on the activity of these fluoroquinolones, where lipophilicity, molecular mass and electronic factors may influence the activity. (C) 2009 Elsevier Ltd. All rights reserved.
Rational design, synthesis, molecular modeling, biological activity, and mechanism of action of polypharmacological norfloxacin hydroxamic acid derivatives
作者:Ahmed M. Kamal El-sagheir、Ireny Abdelmesseh Nekhala、Mohammed K. Abd El-Gaber、Ahmed S. Aboraia、Jonatan Persson、Ann-Britt Schäfer、Michaela Wenzel、Farghaly A. Omar
DOI:10.1039/d3md00309d
日期:——
and in vivo mode of action studies. Molecular docking, enzyme inhibition, and bacterial cytological profiling confirmed inhibition of gyrase and topoisomerase IV for all except two tested derivatives (10f and 11f). Further phenotypic analysis revealed polypharmacological effects on peptidoglycansynthesis for four derivatives (16a, 17a, 17b, 20b). Interestingly, compounds 17a, 17b, and 20b, showed