Abstract
The effect of electronic properties of substituents in the reactants on the [4+2]-cycloaddition of 3-vinyl-chromen-4-ones (dienes) and N-vinylpyrrolidines (dienophiles) has been studied. The conditions determining the formation of 4,4a-dihydroxanthones or benzophenones as the major products have been found. The aromatization of 4,4a-dihydroxanthones via pyran ring opening has been interpreted by quantum chemical calculations. A wide series of new 4,4a-dihydroxanthone and benzophenone derivatives have been isolated.
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This study was financially supported by the scholarship from the Council for Grants at the President of the Russian Federation (competition SP-2019).
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Chernov, N.M., Moroz, T.V., Shutov, R.V. et al. Synthesis of New 4,4a-Dihydroxanthones via [4+2]-Cycloaddition Reaction. Russ J Gen Chem 89, 2463–2470 (2019). https://doi.org/10.1134/S1070363219120223
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DOI: https://doi.org/10.1134/S1070363219120223