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    • 6. 发明授权
    • Method for producing α-L-aspartyl-L-phenylalanine-β-ester and method for producing α-L-aspartyl-L-phenylalanine-α-methyl ester
    • 生产α-L-天冬氨酰-L-苯丙氨酸-β-酯的方法及其制备α-天冬氨酰-L-苯丙氨酸-α-甲酯的方法
    • US07361458B2
    • 2008-04-22
    • US10876673
    • 2004-06-28
    • Kenzo YokozekiAyako OhnoSeiichi HaraIsao Abe
    • Kenzo YokozekiAyako OhnoSeiichi HaraIsao Abe
    • C12P21/06C12Q1/00C12Q1/68
    • C07K5/0613A23L27/32C07K5/06113C12P21/02C12P21/06
    • A method for producing an α-L-aspartyl-L-phenylalanine-β-ester (also named α-L-(β-o-substituted aspartyl)-L-phenylalanine), which is an intermediate of an α-L-aspartyl-L-phenylalanine-α-methyl ester (also named α-L-aspartyl-L-phenylalanine methyl ester; product name: aspartame), easily, at high yield and inexpensively without going through a complex synthesis method is provided. Further, an easy, inexpensive and high-yield production method for an α-L-aspartyl-L-phenylalanine-α-methyl ester is provided. α-L-aspartyl-L-phenylalanine-α-methyl ester is produced from a L-aspartic acid-α,β-diester and L-phenylalanine using an enzyme or enzyme-containing substance that has an ability to catalyze a reaction in which L-phenylalanine performs no nucleophilic attack on a β-ester site of L-aspartic acid-α,β-diester but performs a nucleophilic attack on an α-ester site thereof.
    • 制备α-L-天冬氨酰基-L-苯丙氨酸-β-酯(也称为α-L-(β-邻位取代的天冬氨酰基)-L-苯丙氨酸)的方法,其为α-L-天冬氨酰基 提供了L-苯丙氨酸-α-甲酯(也称为α-L-天冬氨酰基-L-苯丙氨酸甲酯;商品名:阿斯巴甜),容易地以高产率和低成本地经历复合合成方法。 此外,提供了一种用于α-L-天冬氨酰基-L-苯丙氨酸-α-甲酯的容易,便宜且高产量的制备方法。 使用具有催化反应能力的酶或含酶物质由L-天冬氨酸-α,β-二酯和L-苯丙氨酸生产α-L-天冬氨酰基-L-苯丙氨酸-α-甲酯,其中 L-苯丙氨酸不对L-天冬氨酸-α,β-二酯的β-酯位点进行亲核攻击,但对其α-酯位点进行亲核攻击。