The present invention provides a method of preparing α,β-unsaturated ketolactones which are useful for production of prostaglandins having one or more halogen substituent(s) at the 16 or 17 portion in high yield, in which, a dimethyl (2-oxoalkyl) phosphonate having one or more halogen substituents, a starting material, is reacted with a bicyclolactone aldehyde under the presence of an alkali metal hydride and a zinc compound.
本发明提供了一种高产率制备α,β-不饱和酮内酯的方法,该酮内酯可用于生产在 16 或 17 部分具有一个或多个卤素取代基的
前列腺素,其中,具有一个或多个卤素取代基的(2-氧代烷基)
膦酸二甲酯(一种起始原料)在碱
金属
氢化物和
锌化合物存在下与双环内酯醛反应。