The present invention aims to provide a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid with high purity, and a method for producing its derivative. The present invention provides a method for producing a cis-5-hydroxy-2-piperidinecarboxylic acid derivative, which method comprises a step of converting cis-5-hydroxy-2-piperidinecarboxylic acid into a compound(s) of Formula (1) and/or Formula (2) (wherein R
1
represents a protective group for an amino group, and R2 represents a C
1
-C
6
alkyl group), and a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid.
本发明旨在提供一种高纯度纯化顺式-
5-羟基-2-哌啶羧酸的方法,以及其衍
生物的生产方法。本发明提供了一种生产顺式-
5-羟基-2-哌啶羧酸衍
生物的方法,该方法包括将顺式-
5-羟基-2-哌啶羧酸转化为式(1)和/或式(2)化合物的步骤(其中R1代表
氨基的保护基,R2代表C1-C6烷基),以及一种纯化顺式-
5-羟基-2-哌啶羧酸的方法。