Synthesis, Molecular docking and Antibacterial Evalution of some Novel N-4 Piperzinyl derivatives of 8-Methoxy Grepafloxacin

• Published in: Research journal of pharmacy and technology 2018-07, Vol.11 (7), p.3103-3112
• Main Authors: Kumar, K Hemanth Sudheer, Parameshwar, H
• Format: Article
• Language: English
• Subjects: Antibiotics; Antimicrobial agents; Bacteria; Bronchitis; Deoxyribonucleic acid; DNA; DNA methylation; Drug dosages; Gram-positive bacteria; Mass spectrometry; NMR; Nuclear magnetic resonance; Pneumonia; Scientific imaging; Streptococcus infections; Studies
• ISSN: 0974-3618; 0974-360X; 0974-306X
• DOI: 10.5958/0974-360X.2018.00570.X

Expermental: Procedure for synthesis of (Compound P or 8-methoxy grepafloxacin) 1 -cyclopropyl-6-fluoro-8-methoxy-5methyl-7-(3 -methylpiperazin-1 -yl)-4-oxo-1,4dihydroquinoline-3-carboxylic acid from (Compound O or gatifloxacin) 1-cyclopropyl-6-fluoro-8-methoxy-7-(3methylpiperazin-1 -yl)-4-oxo-1,4-dihydroquinoline-3 - carboxylic acid: A mixture of active ingredient of gatifloxacin (4g, 25.6 mmol), potassium hydroxide(pallet, 2.5g), dimethyl carbonate(8mL, 94.9mmol), N,N-dimethylformamide (50mL) and tetrabutylammonium bromide 0.5g were mixed together and heated to 1280C for 10 h. The reaction mixture was cooled to room temperature, then was diluted with water (120mL). A stock solution of the synthesized compound (100 qg/ml) in dimethyl formamide was prepared and graded quantities of the test compounds were incorporated in specified quantity of molten sterile agar (nutrient agar for anti- bacterial activity and sabouraud dextrose agar medium for anti-fungal activity). First the ligand molecule was build, in second step required protein was downloaded from PDB, preparation and validation of macromolecule by X-ray crystallography. [...]step is identification of binding affinity by the extent of binding of ligand to the protein of molecule.