A method of preparing optically pure (S)-3-hydroxypyrrolidine is disclosed. The present invention provides a method of economically and industrially preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising introducing an amine protecting group by using optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, reducing a carboxylic acid group into a primary alcohol, removing the amine protecting group to form an amine salt, halogenating the primary alcohol, and amine cyclization; and through a simple purification process, i.e., distillation under reduced pressure. As another method, the present invention provides a method of preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising esterifying optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, lactam cyclization, and reduction.
本发明公开了一种制备光学纯(S)-
3-羟基吡咯烷的方法。本发明通过使用光学纯4-
氨基-(S)-2-羟基
丁酸作为起始物质,引入胺保护基,将
羧酸基还原为一级醇,去除胺保护基形成胺盐,卤代一级醇,进行胺环化反应,然后通过简单的纯化过程,即减压蒸馏,经济、工业地制备光学和
化学纯(S)-
3-羟基吡咯烷。另外,本发明提供了另一种制备光学和
化学纯(S)-
3-羟基吡咯烷的方法,包括以光学纯4-
氨基-(S)-2-羟基
丁酸为起始物质,酯化、内酰胺环化和还原等步骤。