SYNTHESIS OF SCHIFF’S BASE DERIVATIVES OF OXAZINE FROM CHALCONES AND EVALUATION OF THEIR ANTIBACTERIAL ACTIVITY
P. Anusha*, P. Manichandrika, S. Shruthi, Syeda Uzma Nishat, Sumaiyya Sultana
ABSTRACT
Chalcone is a generic term given to compounds bearing the 1, 3-diphenyl-2-propen-1-one framework. Chalcones are the bichromophoric molecules separated by a keto-vinyl chain and belong to the flavonoid family. Oxazine heterocycles have special interest because they constitute an important class of natural and non natural products and show useful biological activities. Its increasing importance in pharmaceutical and biological field, we are planned to synthesize oxazine derivatives for their biological activities. A considerable amount of research activity is directed towards a potent, more specific and less toxic compounds. We planned to synthesize Schiff base oxazine derivatives from chalcones and evaluate for antibacterial activity. The synthesized compounds were confirmed
structurally by means of IR, 1HNMR, Mass spectral analysis. Further, the synthesized compounds (5a1, 5a2, 5a3, 5a4, 5a5, 5b1, 5b2, 5b3, 5b4, 5b5) were screened for anti bacterial activity at the concentration of 50g/ml and 100g/ml using DMF as a control against the organism’s Bacillus Pumilus, Bacillus subtilis, Staphylococcus aureus, Eschertia coli and Pseudomonas aeruginosa by disc diffusion method on nutrient agar media. The standard drug used was Ampicillin for the comparison at the concentration 50g/ml and 100g/ml against all the above mentioned organisms. Results indicates that compounds 5b4, 5b5 and found to posess good antibacterial activity against the organisms. Eschertia coli and Pseudomonas aeruginosa at 100g/ml concentration. Whereas the compound 5b2 was found posses good antibacterial activity against all the tested organisms, which is equipotent to the standard drug Ampicilline.
Keywords: Antimicrobial activity, Chalcones, IR, 1HNMR, Mass spectroscopy, Oxazine.
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