申请人:R-TECH UENO, LTD.
公开号:EP0507625A1
公开(公告)日:1992-10-07
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。