A method is proposed for the synthesis of 3-nitro-2-phenyl-2-(trifluoromethyl)-2H-chromenes by tandem condensation of salicylic aldehydes with (E)-3,3,3-trifluoro-1-nitro-2-phenylprop-1-ene in the presence of triethylamine. The example of 3-nitro-2-phenyl-2-(trifluoromethyl)-2H-chromene was used to demonstrate conjugated addition reactions with enamines, nitromethane, and aniline, which are characteristic for this class of compounds. The structure of the obtained products was confirmed by X-ray structural analysis.
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The work was financially supported by the government of the Russian Federation (program 211, contract No. 02.A03.21.0006).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2016, 52(10), 814–822
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Barkov, A.Y., Korotaev, V.Y., Kotovich, I.V. et al. 3-Nitro-2-phenyl-2-(trifluoromethyl)-2H-chromenes: synthesis and reactions with nucleophiles. Chem Heterocycl Comp 52, 814–822 (2016). https://doi.org/10.1007/s10593-016-1971-y
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DOI: https://doi.org/10.1007/s10593-016-1971-y