A process for preparing an optically active fluorine-containing compound, which comprises reacting a stereoisomer of a compound which has an ester carbonyl group or a lactam carbonyl group and has a hydroxyl group bonded to an asymmetric carbon atom at β-position of the carbonyl group, with a fluorinating agent which is a reaction product of hexafluoropropene and diethylamine in an amount of 1 to 5 moles to 1 mole of the stereoisomer by controlling a temperature of the reaction system within a range from-50° to 25 °C to substitute the hydroxyl group by fluorine atom; said optically active fluorine-containing compound has a configuration inverse to that of the starting stereoisomer. According to the present invention, the hydroxyl group can be stereoselectively fluorinated at a relatively high temperature.
一种制备光学活性含
氟化合物的工艺,包括将具有酯羰基或内酰胺羰基且羟基键合在羰基β位不对称碳原子上的化合物立体异构体,与
六氟丙烯和
二乙胺的反应产物
氟化剂反应,
氟化剂的用量为1至5摩尔对1摩尔立体异构体,反应体系的温度控制在50°至25°C范围内,以
氟原子取代羟基;所述光学活性含
氟化合物的构型与起始立体异构体的构型相反。 根据本发明,羟基可在相对较高的温度下进行立体选择性
氟化。