The present invention provides a production method of an optically active &bgr;-amino-&agr;-hydroxycarboxylic acid, which includes the following steps (a)-(c):
(a) treating an optically active N-carbamate protected &bgr;-amino epoxide with an acid to give an optically active 5-hydroxymethyl-2-oxazolidinone;
(b) oxidizing the resulting compound in the presence of 2,2,6,6-tetramethyl-1-piperidinyloxy and hypochlorite to give an optically active 4-benzyl-2-oxo-5-oxazolidinecarboxylic acid; and
(c) treating the 4-benzyl-2-oxo-5-oxazolidinecarboxylic acid with a base, and a production method of an optically active N-carbamate protected &bgr;-amino-&agr;-hydroxycarboxylic acid which includes protection of the amino group with a carbamate type protecting group. The industrial production method of the present invention can produce these compounds efficiently.
本发明提供了一种光学活性β-
氨基-α-羟基
羧酸的生产方法,包括以下步骤(a)-(c):(a) 用酸处理光学活性N-羰基保护的β-
氨基环氧化合物,得到光学活性
5-羟甲基-
2-噁唑烷酮;(b) 在2,2,6,6-四甲基-1-
哌啶氧和
次氯酸盐存在下氧化所得化合物,得到光学活性4-苄基-2-氧代-5-
噁唑烷
羧酸;(c) 用碱处理4-苄基-2-氧代-5-
噁唑烷
羧酸,并且提供了一种光学活性N-羰基保护的β-
氨基-α-羟基
羧酸的生产方法,其中包括用羰酸酯型保护基保护
氨基团。本发明的工业生产方法可以高效地生产这些化合物。