Abstract
Saponification of the appropriate 3-carbethoxy-α-pyrones gives α-pyrone-3-carboxylic acid and its homologs, further converted via their acid chlorides to the substituted amides of the acids.
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Shramova, Z.I., Skoldinov, A.P. Some derivatives of α-pyrone-3-carboxylic acid and its homologs. Chem Heterocycl Compd 3, 475–477 (1967). https://doi.org/10.1007/BF00481574
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DOI: https://doi.org/10.1007/BF00481574