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Zenodo
2024
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| Online Access: | https://doi.org/10.5281/zenodo.13853486 |
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Table of Contents:
- <div> <p><em><span>The literature survey indicates that benzopyran derivatives possess different pharmacological and biological activities. Coumarin derivatives have been shown to have interesting pharmacological activities such as antibacterial, anti-inflammatory, and antifungal activities. When one biologically active molecule is linked to another, the resultant molecule generally has an increased potency. Therefore, in the present study, two systems of Coumarin and chalcone are fused to obtain highly potent, specifically anti-inflammatory and less toxic antibacterial agents. The objective of the present work is to synthesize chalcone-substituted Coumarin derivatives and in particular study their antibacterial properties. The paper makes a modest attempt in that direction. <span> </span>Coumarin derivatives were synthesized using SSA as a potent catalyst. All the synthesized derivatives were characterized by 1H<sup>1 </sup>NMR, Mass spectra, and I.R. spectra. The antibacterial activity of the compounds was carried out using the disc diffusion method on nutrient agar media. Ampicillin and Gentamycin were used as standard drugs for the comparison in the concentration of 50 µg/ml and 100 µg/ml against Gram-positive and Gram-negative bacteria used for the study. Compounds 3g,3i, and 3j were found to possess good activity while compounds 3a, 3b, 3c, 3d, 3e, and 3f, were found to exhibit moderate activity. Among these various compounds 3g, 3i, and 3j particularly exhibited good activities against gram-negative bacteria.<span> Hence, these compounds appear to be promising anti-bacterial agents. Perhaps the presence of N(CH<sub>3</sub>)<sub>2</sub> and OH as a substituent on the aromatic nucleus attached to the 4<sup>th</sup> position attached to Coumarin nucleus at the 3rd may be responsible for the good anti-bacterial activity.</span></span></em></p> <p><strong><em><u><span>Key words:</span></u></em></strong><em><span> Silica Sulphuric Acid Catalyst, Disc Diffusion Method, Antibacterial Activity, Coumarin, Chalcones</span></em></p> </div>