申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0125714A1
公开(公告)日:1984-11-21
A process for preparing 1-substituted azetidin-3-ol derivatives of formula:
or an acid halide thereof, in which R' is an aryl methyl group; and R2 is a hydrogen atom or an alkyl, aryl or aralkyl group, which comprises
(a) reacting an epoxy halide of formula:
in which Hal is a halogen atom, with a primary amine of formula:
(b) cyclising the resulting addition product of formula:
in an aqueous medium to form the acid halide of the compound of formula 1, and
(c) when the free hydroxy compound of formula I is required, treating said acid halide with a base.
The compounds are intermediates e.g. for the preparation of azetidine-3-carboxylic acid derivatives which exhibit plant growth regulant properties.
一种制备式 1-取代的氮杂环丁烷-3-醇衍生物或其酸卤化物的工艺,其中 R' 为芳基甲基;R2 为氢原子或烷基、芳基或芳烷基:
或其酸卤化物,其中R'为芳基甲基;R2为氢原子或烷基、芳基或芳烷基,该工艺包括
(a) 使式 2 的环氧卤化物反应:
式中 Hal 是卤素原子,R2 是氢原子或烷基、芳基或芳烷基:
(b) 在水性介质中将生成的式......加成产物环化
(b) 在水介质中环化所生成的式的加成产物,以形成式 1 化合物的酸卤化物,以及
(c) 当需要式 I 的游离羟基化合物时,用碱处理所述酸卤化物。
这些化合物是制备具有植物生长调节特性的氮杂环丁烷-3-羧酸衍生物的中间体。