Method for production of alpha-L-aspartyl-L-phenylalanine methyl ester hydrochloride
申请人:Ajinomoto Co., Inc.
公开号:EP0581032A1
公开(公告)日:1994-02-02
The methyl ester of α-L-aspartyl-L-phenylalanine may be obtained in high yields directly from a reaction solution which contains N-protected- or unprotected-α-L-aspartyl-D-phenylalanine (or its methyl ester derivative), and α-L-aspartyl-L-phenylalanine methyl ester by selective crystallization of the α-L-aspartyl-L-phenylalanine methyl ester hydrochloride from an aqueous solution containing N-protected- or unprotected-L-aspartyl-L-phenylalanine and/or its methyl ester derivative and N-protected- or unprotected-L-aspartyl-D-phenylalanine and/or its methyl ester derivative, hydrochloric acid, and methanol, with or without stirring.
α-L-天冬氨酰-L-苯丙氨酸甲酯可直接从含有 N-保护-或未保护-α-L-天冬氨酰-D-苯丙氨酸(或其甲酯衍生物)的反应溶液中高产获得、和α-L-天冬氨酰-L-苯丙氨酸甲酯,方法是在搅拌或不搅拌的情况下,从含有 N-保护-或未保护-L-天冬氨酰-L-苯丙氨酸和/或其甲酯衍生物和 N-保护-或未保护-L-天冬氨酰-D-苯丙氨酸和/或其甲酯衍生物、盐酸和甲醇的水溶液中选择性地结晶出α-L-天冬氨酰-L-苯丙氨酸甲酯盐酸盐。