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- W2952123303 abstract "The reaction of 4,5-epoxy-4-halo-6-methoxy-2-methyl- tetrahydropyran-3-ones (4b and 5b) in acidic media was examined and the following results were found: The reaction of 4b or 5b with 1% sulfuric acid afforded a mixture of 3,5-dihydroxy-4H- pyran-4-one (1b) and 5-halo-3-hydroxy-4H-pyran-4-one (2b or 3b), but the use of concentrated acid formed the corresponding 5-halo- 4H-pyran-4-one (2b or 3b) only. The reaction was applicable for a general method for synthesizing 3,5-disubstituted 4H-pyran-4- ones (1, 2, and 3)" @default.
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- W2952123303 date "1992-01-01" @default.
- W2952123303 modified "2023-09-27" @default.
- W2952123303 title "A Convenient Synthesis of 3-Hydroxy-4H-pyran-4-one Derivatives Having a Halo or Hydroxy Group at the 5-Position" @default.
- W2952123303 doi "https://doi.org/10.3987/com-92-6090" @default.
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