SYNTHESIS OF (2, 4-DIMETHOXY – 3 – ((3 – PHENYL – 4, 5 – DIHYDROISOXAZOL – 5 – YL) METHOXY) PHENYL) (PHENYL) METHANONE AND THEIR ANTIBACTERIAL ACTIVITY

In this study, a series of novel Synthesis of (2,4-dimethoxy-3-((3- phenyl-4, 5- dihydroisoxazol-5-yl) methoxy) phenyl) (phenyl) methanone (8a-p), were synthesized from condensation of an equimolar quantity of aryl (3- hydroxy-2, 4-dimethoxyphenyl) methanones (4a-d) and 5-(bromomethyl)-3- phenyl-4,5-dihydroisoxazole (7a-d) in DMF solvent by employing anhydrous potassium carbonate (K₂CO₃) as a base. The chemical structure of the newly synthesized compounds was characterized by analytical and spectral (¹HNMR, ¹³CNMR and HRMS) techniques. The desired title compounds were screened for qualitative (zone of inhibition) analysis by agar well method, respectively. Among the synthesized compounds in the series, the compounds 8b, 8c, 8f and 8l were found to show major antibacterial activity at a lower concentration, against Gram-positive bacteria such as Bacillus subtilis, Staphylococcus aureus and Gram-negative bacteria such as Salmonella typhimurium, Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae. The rest of the compounds exhibited ample antibacterial activity compared to Chloramphenicol’s standard positive controls.