申请人:The NutraSweet Company
公开号:US06077962A1
公开(公告)日:2000-06-20
This invention relates to the chemical synthesis of N-[N-(3,3-dimethylbutyl)-L-.alpha.-aspartyl]-L-phenylalanine 1-methyl ester using peptide coupling methods. The coupling reaction is conducted by condensation of an activated derivative of novel N-neohexyl-L-aspartic acid with L-phenylalanine or L-phenylalanine methyl ester or by enzymatic coupling of N-neohexyl-L-aspartic acid with L-phenylalanine or L-phenylalanine methyl ester. This invention also relates to novel N-(3,3-dimethylbutyl)-L-aspartic acid, derivatives thereof and the preparation thereof. The activated derivative of N-neohexyl-L-aspartic acid may be an anhydride, mixed anhydride, active ester or an intermediate activated derivative thereof.
本发明涉及使用肽偶联方法化学合成N-[N-(3,3-二甲基丁基)-L-α-天冬氨酸]-L-苯丙氨酸1-甲酯。偶联反应通过新型N-新己基-L-天冬氨酸的活化衍生物与L-苯丙氨酸或L-苯丙氨酸甲酯缩合进行,或通过N-新己基-L-天冬氨酸与L-苯丙氨酸或L-苯丙氨酸甲酯的酶偶联反应进行。本发明还涉及新型N-(3,3-二甲基丁基)-L-天冬氨酸及其衍生物的制备。N-新己基-L-天冬氨酸的活化衍生物可以是酸酐、混合酸酐、活性酯或其中间活化衍生物。