Furo[2,3-h]chromone and pyrano[2′,3′:5,6]chromeno[4,3-b]pyridine derivatives were synthesized from 7-hydroxy-8-formylisoflavones, which were prepared from natural isoflavones using a Duff reaction, via reactions with bromoacetophenones and ethyl 3-aminocrotonate, respectively.
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Translated from Khimiya Prirodnykh Soedinenii, No. 6, November–December, 2018, pp. 904–906.
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Shokol, T.V., Gorbulenko, N.V., Frasinyuk, M.S. et al. Furo[2,3-h]Chromones and Pyrano[2′,3′:5,6]Chromeno [4,3-B]Pyridines Based on Natural Isoflavones. Chem Nat Compd 54, 1064–1067 (2018). https://doi.org/10.1007/s10600-018-2556-z
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DOI: https://doi.org/10.1007/s10600-018-2556-z