Abstract
A number of new biologically interesting fluorinated 2-arylchroman-4-ones and their 3-arylidene derivatives were synthesized based on the p-toluenesulfonic acid-catalyzed one-pot reaction of 2-hydroxyacetophenones with benzaldehydes. It was found that obtained (E)-3-arylidene-2-aryl-chroman-4-ones reacted with malononitrile under base conditions to form 4,5-diaryl-4H,5H-pyrano[3,2-c]chromenes. The structures of the synthesized fluorinated compounds were confirmed by 1H, 19F, and 13C NMR spectral data, and for some representatives of heterocycles also using NOESY spectra and X-ray diffraction analysis. A large series of obtained flavanone derivatives as well as products of their modification (35 examples) containing from 1 to 12 fluorine atoms in the structure was tested in vitro for cytotoxicity in MDCK cell line and for antiviral activity against influenza A virus. Among the studied heterocycles 6,8-difluoro-2-(4-(trifluoromethyl)phenyl)chroman-4-one (IC50 = 6 μM, SI = 150) exhibited the greatest activity against influenza A/Puerto Rico/8/34 (H1N1) virus. Moreover, this compound appeared active against phylogenetically distinct influenza viruses, A(H5N2) and influenza B (SI’s of 53 and 42, correspondingly). The data obtained suggest that the fluorinated derivatives of 2-arylchroman-4-ones are prospective scaffolds for further development of potent anti-influenza antivirals.
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Acknowledgements
The authors thank the Multi-Access Chemical Service Center SB RAS for spectral and analytical measurements, and the Russian Science Foundation (Project No. 23-23-00008) for financial support.
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NT: methodology, chemical experiments performing, writing—original draft preparation; LP: conceptualization, methodology, chemical experiments performing, writing—review and editing, funding acquisition, supervision, project administration; IB: RSA investigation, Writing—original draft preparation; IC: NMR investigation, Writing—original draft preparation; JW: chemical experiments performing; PI: biological experiments performing; MM: biological experiments performing; IE: biological experiments performing; AV: biological experiments performing; VZ: methodology, biological experiments performing, writing—review and editing. All authors have read and agreed to the published version of the manuscript.
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Troshkova, N., Politanskaya, L., Bagryanskaya, I. et al. Fluorinated 2-arylchroman-4-ones and their derivatives: synthesis, structure and antiviral activity. Mol Divers (2023). https://doi.org/10.1007/s11030-023-10769-6
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DOI: https://doi.org/10.1007/s11030-023-10769-6