A process for preparing a 3-oxy-4H-pyran-4-one derivative which comprises the steps of: 1. epoxidizing a 3-oxo-3,6-dihydro-2H-pyran derivative with a peroxide to obtain a 4,5-epoxy-3-oxotetrahydropyran derivative, and 2. heating the 4,5-epoxy-3-oxotetrahydropyran derivative.
制备3-氧基-4H-
吡喃-4-酮衍
生物的过程包括以下步骤:1. 使用过氧化物将3-氧基-3,6-二氢-
2H-吡喃衍
生物环氧化,得到4,5-环氧-3-氧基
四氢吡喃衍
生物;2. 加热4,5-环氧-3-氧基
四氢吡喃衍
生物。