Process for preparing 3-oxy-4H-pyran-4-one derivatives
申请人:Otsuka Kagaku Yakuhin Kabushiki Kaishi
公开号:US04059595A1
公开(公告)日:1977-11-22
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.