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    • 3. 发明授权
    • Process for preparing optically active phenylalanine
    • 制备光学活性苯丙氨酸的方法
    • US4542236A
    • 1985-09-17
    • US634228
    • 1984-07-25
    • Yasuhisa TashiroShigeru Aoki
    • Yasuhisa TashiroShigeru Aoki
    • C07B57/00C07C101/08
    • C07C227/34
    • The present invention relates to a process for preparing optically active phenylalanine which comprises resolving mixture of a complex of D-phenylalanine and optically active mandelic acid and a complex of L-phenylalanine and optically active mandelic acid in a solvent containing hydrochloric acid, carboxylic acid, phosphoric acid or a salt thereof to obtain the complex having lower solubility, and removing said optically active mandelic acid from the obtained complex to obtain an optically active phenylalanine.In the case of resolving DL-phenylalanine by the process according to the present invention, the amount of mother liquor used in resolution can be made to about 1/2 to 1/6 as compared to the amount of mother liquor of which the acidic compound or the salt thereof is not used in the resolution. Accordingly, the process according to the present invention is extremely profitable as an industrial process for producing an optically active phenylalanine.
    • 本发明涉及一种光学活性苯丙氨酸的制备方法,其包括将D-苯丙氨酸和光学活性扁桃酸的配合物与L-苯丙氨酸和光学活性扁桃酸的配合物在含有盐酸,羧酸, 磷酸或其盐以获得具有较低溶解度的络合物,并从所得络合物中除去所述光学活性扁桃酸,得到光学活性苯丙氨酸。 在通过根据本发明的方法分解DL-苯丙氨酸的情况下,与其中酸性化合物的母液的量相比,分辨率中使用的母液的量可以制成约1/2至1/6 或其盐不在分辨率中使用。 因此,根据本发明的方法作为用于制备光学活性苯丙氨酸的工业方法是非常有利的。