Abstract
New derivatives of coumarin, containing annulated α-pyrone rings, were obtained by reaction of the borate complexes of three isomeric acyl(hydroxy)coumarins with acid anhydrides. It was shown that the borate complex of 3-acetyl-4-hydroxy-2-pyrone also condenses with acetic anhydride to form a derivative containing a new annulated α-pyrone ring.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 513–517, April, 2007.
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Traven, V.F., Voevodina, I.V., Manaev, A.V. et al. A new method for annulation of the α-pyrone ring. Chem Heterocycl Compd 43, 416–420 (2007). https://doi.org/10.1007/s10593-007-0059-0
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DOI: https://doi.org/10.1007/s10593-007-0059-0