A series of 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethylchroman-7-ol and 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethylchroman-5-ol derivatives have been synthesized from the corresponding chalcones and hydrazine hydrate in the presence of sodium acetate under microwave irradiation involving the Michael addition followed by cycloaddition. All the newly synthesized 18 compounds were screened for their in vitro antimicrobial activity. Most of the compounds displayed very good to excellent antimicrobial activity in comparison to standard drugs streptomycin and nystatin.
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We thank the Head of Department of Chemistry, Osmania University, Hyderabad, for providing laboratory facilities. One of the authors (MGD) is grateful to University Grants Commission, New Delhi, for the award of Senior Research Fellowship. We also thank the CFRD analytical team, Osmania University, for providing spectral analysis facilities.
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Supporting material to this article containing of 1H NMR, 13C NMR, and mass spectra of the synthesized compounds is available online at http://link.springer.com/journal/10593.
Published in Khimiya Geterotsiklicheskikh Soedinenii, 2015, 51(10), 872–882
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Dongamanti, A., Devulapally, M.G., Aamate, V.K. et al. Microwave-assisted synthesis and antimicrobial evaluation of novel pyrazolines. Chem Heterocycl Comp 51, 872–882 (2015). https://doi.org/10.1007/s10593-015-1790-6
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DOI: https://doi.org/10.1007/s10593-015-1790-6