An objective of the present application is to provide an industrially practicable method for producing an optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof from an inexpensive easily-available starting material. The derivative or salt thereof is useful as an intermediate for a medicine. It is also intended by the present application to provide a useful intermediate of the derivative. The objective is attained by the following method. First, an easily-available 2-halo-3-oxopropionic acid derivative is asymmetrically reduced, and then epoxidated to produce an optically-active epoxycarboxylic acid derivative. Next, the derivative is converted into an optically-active epoxyamide derivative by reaction with cyclopropylamine, and then reacted with a nitrile to obtain an optically-active oxazolinamide derivative. Subsequently, selective acid solvolysis of the oxazoline skeleton gives the optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof.
本申请的目标是提供一种工业实用的方法,从廉价易得的起始物质中生产出光学活性的3-
氨基-2-羟基
丙酸环丙酰胺衍
生物或其盐。该衍
生物或其盐可用作药物的中间体。本申请还旨在提供该衍
生物的有用中间体。该目标通过以下方法实现。首先,对易得的2-卤代-3-酮
丙酸衍
生物进行不对称还原,然后环氧化,以产生光学活性的环氧
羧酸衍
生物。接下来,通过与
环丙胺反应将该衍
生物转化为光学活性的环氧酰胺衍
生物,然后与腈反应得到光学活性的
噁唑烷酰胺衍
生物。随后,对
噁唑烷骨架进行选择性酸性溶解,得到光学活性的3-
氨基-2-羟基
丙酸环丙酰胺衍
生物或其盐。