Abstract
An expedient synthesis of coumarin-pyridone conjugate molecules 2a-o is reported via one-pot reaction between (E)-3-(3-arylacryloyl)-2H-chromen-2-ones 1a-o, ethyl 2-nitroacetate and ammonium acetate. The structures of synthesized compounds have been unambiguously confirmed by spectroscopic analyses (NMR, IR and MS). All the compounds were screened for their anti-microbial activities against three Gram-positive bacterial strains, two Gram-negative bacterial strains and four fungal organisms. Compounds 2d, 2i, 2k, 2o exhibited mild anti-bacterial activity and 2d, 2m were found to be moderately active against all the tested fungal organisms. Compound 2k showed good inhibitory potential against the tested yeasts organisms.
Graphical Abstract
Expedient synthesis of coumarin-pyridone conjugate molecules has been reported via one-pot, three-component reaction between (E)-3-(3-arylacryloyl)-2H-chromen-2-ones, ethyl 2-nitroacetate and ammonium acetate. Anti-microbial activity of these compounds was evaluated and the results indicated that some of the compounds exhibited mild anti-bacterial activity and good inhibitory potential against the tested fungal organisms.
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The authors are thankful to Department of Chemistry, University of Jammu for providing all necessary facilities, Department of Science and Technology, GOI, New Delhi for funding (Project No. SR/S1/OC-38/2010) and NMR facility under PURSE.
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Khajuria, R., Mahajan, S., Ambica et al. Expeditious synthesis of coumarin-pyridone conjugates molecules and their anti-microbial evaluation. J Chem Sci 129, 1549–1557 (2017). https://doi.org/10.1007/s12039-017-1362-7
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DOI: https://doi.org/10.1007/s12039-017-1362-7