Abstract
A series of 4-aryl methylidene-2-phenyl/methyl-5-(4H)-oxazolone derivatives (2-7) have been synthesized using the reported method by condensation of aldehydes with N-benzoyl / N-acetyl glycine in the presence of zinc oxide as a catalyst and acetic anhydride at room temperature in ethanol. The compounds (2-6) are new derivatives. The structures of compounds were evaluated on the basis of 1H-NMR, 13C-NMR, EIMS, FT-IR and elemental analysis. All the compounds were screened for their antibacterial and urease inhibition activity. Antibacterial activity was tested by agar well diffusion method using Mueller Hinton Agar medium. Compound (2) showed excellent activity against S. aureus which has 16 mm (80%) inhibition and above 24 mm (70%) against S. typhi. The most active compound against E. coli was compound (6) having 20 mm (80%) inhibition followed by compound (5) having above 18 mm (70%) inhibition. Urease inhibition activity of all the compounds was determined by indophenol method. Compounds (3, 6) and (7) showed significant inhibition against Jacks bean urease.
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