2-Butyryl-2-chloro-4-methoxycarbonyl-5,5-dimethyl-1,3-cyclohexanedione 在
potassium carbonate 作用下,
以
苯 为溶剂,
反应 48.0h,
生成 6,6-dimethyl-4,8-dioxo-5-methoxycarbonyl-2-propyliden-3-oxabicyclo<3.3.0>octane 、 6,6-dimethyl-4,8-dioxo-5-methoxycarbonyl-2-propyl-3-oxabicyclo<3.3.0>oct-1-ene 、
2-butanoyl-5,5-dimethyl-4-methoxycarbonyl-4-chlorocyclohexane-1,3-dione