申请人:Ajinomoto Co., Inc.
公开号:EP2123629A1
公开(公告)日:2009-11-25
The present invention aims to provide a method of conveniently isolating and purifying as well as separating and removing (2S,3R,4S)-4-hydroxyisoleucine at a high purity and in a high yield. Specifically, the present invention discloses a purification method of (2S,3R,4S)-4-hydroxyisoleucine or a chemically acceptable salt thereof, which includes the following steps (a), (b) and (c):
(a) a step of reacting (2S,3R,4S)-4-hydroxyisoleucine or a chemically acceptable salt thereof in a mixture with an aldehyde compound represented by the formula: Q-CHO wherein Q is an aryl group having a carbon number of 6 to 14, an alkyl group having a carbon number of 1 to 10, a cycloalkyl group having a carbon number of 3 to 10 or a 5- to 10-membered heterocyclic group, each of which optionally has substituent(s), or an equivalent form thereof to give a compound represented by the formula (1)
wherein Q is as defined above,
(b) a step of extracting the compound represented by the formula (1) with an organic solvent, and
(c) a step of converting the compound represented by the formula (1) to (2S,3R,4S)-4-hydroxyisoleucine or a chemically acceptable salt thereof.
本发明旨在提供一种方便地分离和纯化以及高纯度和高产率地分离和去除(2S,3R,4S)-4-羟基异亮氨酸的方法。具体而言,本发明揭示了一种(2S,3R,4S)-4-羟基异亮氨酸或其化学上可接受的盐的纯化方法,包括以下步骤(a)、(b)和(c):(a) 在与由式Q-CHO表示的醛化合物的混合物中反应(2S,3R,4S)-4-羟基异亮氨酸或其化学上可接受的盐,其中Q是具有6至14个碳原子的芳基,具有1至10个碳原子的烷基,具有3至10个碳原子的环烷基或具有5至10个成员的杂环基,每个基可选地具有取代基,或其等效形式,以给出由式(1)表示的化合物,其中Q如上所定义,(b) 用有机溶剂提取由式(1)表示的化合物的步骤,和(c) 将由式(1)表示的化合物转化为(2S,3R,4S)-4-羟基异亮氨酸或其化学上可接受的盐的步骤。