Method for preparing .alpha.-L-aspartyl-L-phenylalanine
    72.
    发明授权
    Method for preparing .alpha.-L-aspartyl-L-phenylalanine 失效
    制备α-L-天冬氨酰-L-苯丙氨酸的方法

    公开(公告)号:US5362903A

    公开(公告)日:1994-11-08

    申请号:US152134

    申请日:1993-11-16

    CPC分类号: C07K5/0613

    摘要: This invention is directed to provide a method for obtaining .alpha.-L-aspartyl-L-phenylalanine selectively in high yields. Diffusion dialysis with an ion exchange membrane is used to decrease hydrochloric acid concentration of a mixed solution containing hydrochloric acid and one or more of four .alpha.-L-aspartyl-L-phenylalanine derivatives, i.e., .alpha.-L-aspartyl-L-phenylalanine methyl ester, .alpha.-L-aspartyl-L-phenylalanine, .alpha.-L-aspartyl-L-phenylalanine-.beta.-methyl ester and .alpha.-L-aspartyl-L-phenylalanine dimethyl ester. The resultant solution is concentrated, to which a base is added for neutralization. Subsequently, .alpha.-L-aspartyl-L-phenylalanine is crystallized and isolated.

    摘要翻译: 本发明旨在提供以高产率选择性地获得α-L-天冬氨酰基-L-苯丙氨酸的方法。 使用离子交换膜的扩散透析用于降低含有盐酸和四种α-L-天冬氨酰基-L-苯丙氨酸衍生物中的一种或多种的混合溶液的盐酸浓度,即α-L-天冬氨酰基-L-苯丙氨酸甲酯 酯,α-L-天冬氨酰基-L-苯丙氨酸,α-L-天冬氨酰基-L-苯丙氨酸-β-甲酯和α-L-天冬氨酰基-L-苯丙氨酸二甲酯。 将所得溶液浓缩,向其中加入碱进行中和。 随后,将α-L-天冬氨酰基-L-苯丙氨酸结晶并分离。