A process for preparing a compound of the formula
1
comprising:
(a) formation of 3(S)-(4-hydroxyphenyl)-3-methanesulfonyloxy-propionic acid methyl ester compound of the formula
2
(b) cyclization of the product of Step (a) with 4-fluoroaniline to yield 1-(4-fluorophenyl)-4(S)-(4-hydroxyphenyl)-azetidin-2-one.
制备化合物的方法,包括:(a)形成式1的3(S)-(
4-羟基苯基)-3-甲磺氧基
丙酸甲酯化合物的步骤;(b)将步骤(a)的产物与
4-氟苯胺环化,得到1-(4-
氟苯基)-4(S)-(
4-羟基苯基)-氮杂环
丙酮的步骤。