申请人:KYOTO UNIVERSITY
公开号:US20190225634A1
公开(公告)日:2019-07-25
Provided is a method for separating the four optical isomers of Nahlsgen. The method according to the present invention for producing a mixture of a D-2-amino-4-[(Rp)-(3-carboxymethylphenoxy)(methoxy)phosphoryl]butanoic acid hydrate and an L-2-amino-4-[(Sp)-(3-carboxymethylphenoxy)(methoxy)phosphoryl]butanoic acid hydrate includes subjecting a mixture of the four optical isomers, represented by Formula (1′), to fractional crystallization from water or from a solvent mixture of water and a water-soluble organic solvent, to precipitate a mixture of a compound represented by Formula (1-1′-1) and a compound represented by Formula (1-4′-1), where Formulae (1′), (1-1′-1), and (1-4′-1) are expressed as follows:
提供了一种分离Nahlsgen的四种光学异构体的方法。根据本发明的方法,用于产生一种D-2-氨基-4-[(Rp)-(3-羧甲基苯氧基)(甲氧基)磷酰基]丁酸水合物和一种L-2-氨基-4-[(Sp)-(3-羧甲基苯氧基)(甲氧基)磷酰基]丁酸水合物的混合物的方法包括将由式(1′)表示的四种光学异构体的混合物经过从水或水和水溶性有机溶剂的溶剂混合物中的分馏结晶,以沉淀出由式(1-1′-1)和式(1-4′-1)表示的化合物的混合物,其中式(1′)、(1-1′-1)和(1-4′-1)的式如下所示: