Fluorination of 5,6-unsubstituted 1,3-dioxin-4-ones by fluorine followed by treatment with triethylamine affords the title compounds, which can be converted into fluorinated derivatives of either formylacetic acid or of heterocyclic systems.
M. Sato, C. Kaneko, T. Iwaoka, Y. Kobayashi and T. Iida, J. Chem. Soc., Chem. Commun., 1991, 699 DOI: 10.1039/C39910000699
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