title: Design, synthesis, molecular docking, and antibacterial evaluation of some novel flouroquinolone derivatives as potent antibacterial agent.
abstract: OBJECTIVE
  Quinolone moiety is an important class of nitrogen containing heterocycles widely used as key building blocks for medicinal agents. It exhibits a wide spectrum of pharmacophores and has bactericidal, antiviral, antimalarial, and anticancer activities. In view of the reported antimicrobial activity of various fluoroquinolones, the importance of the C-7 substituents is that they exhibit potent antimicrobial activities. Our objective was to synthesize newer quinolone analogues with increasing bulk at C-7 position of the main 6-fluoroquinolone scaffold to produce the target compounds which have potent antimicrobial activity.
  
  
  METHODS
  A novel series of 1-ethyl-6-fluoro-4-oxo-7-{4-[2-(4-substituted phenyl)-2-(substituted)-ethyl]-1-piperazinyl}-1,4-dihydroquinoline-3-carboxylic acid derivatives were synthesized. To understand the interaction of binding sites with bacterial protein receptor, the docking study was performed using topoisomerase II DNA gyrase enzymes (PDB ID: 2XCT) by Schrodinger's Maestro program. In vitro antibacterial activity of the synthesized compounds was studied and the MIC value was calculated by the broth dilution method.
  
  
  RESULTS
  Among all the synthesized compounds, some compounds showed potent antimicrobial activity. The compound 8g exhibited good antibacterial activity.
  
  
  CONCLUSIONS
  This investigation identified the potent antibacterial agents against certain infections.
authors.affiliation: Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, CHARUSAT Campus, Changa, Petlad Taluka, Anand District, Gujarat 388 421, India.
authors.forename: Mehul M
authors.initials: MM
authors.lastname: Patel
authors.affiliation: S. K. Patel College of Pharmaceutical Education and Research, Ganpat University, Kherva, Gujarat 382711, India.
authors.forename: Laxman J
authors.initials: LJ
authors.lastname: Patel
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D027081:DNA Gyrase / Q000737:chemistry; D004250:DNA Topoisomerases, Type II / Q000737:chemistry; D015195:Drug Design; D024841:Fluoroquinolones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D006860:Hydrogen Bonding; D008024:Ligands; D008826:Microbial Sensitivity Tests; D062105:Molecular Docking Simulation
chemical_list: D000900:Anti-Bacterial Agents; D024841:Fluoroquinolones; D008024:Ligands; D027081:DNA Gyrase; D004250:DNA Topoisomerases, Type II