N-benzyloxycarbonyl aspartic acid containing minor contaminating amounts of N-benzyloxycarbonyl aspartyl aspartic acid is purified by subjecting the impure material to alkaline hydrolysis at a pH of at least 10 and at temperatures of from 20°C. to 100°C., preferably 65°C. to 85°C., for a time sufficient to hydrolyze substantially all of the N-benzyloxycarbonyl aspartyl aspartic acid impurity therein. N-benzyloxycarbonyl aspartic acid containing less than 0.2 weight percent of the impurity can be obtained by such treatment.
纯化含有少量
N-苄氧羰基
天冬氨酸杂质的
N-苄氧羰基
天冬氨酸的方法是将不纯物质在 pH 值至少为 10、温度为 20℃至 100℃、最好为 65℃至 85℃的条件下进行碱性
水解,
水解时间足以使其中的
N-苄氧羰基
天冬氨酸杂质基本上全部
水解。通过这种处理可以得到杂质含量小于 0.2 重量%的
N-苄氧羰基
天冬氨酸。