A method for optical resolution of a DL-amino acid comprising reacting the DL-amino acid with an optically active N-acyl aspartic acid in a solvent or mixture of solvents, and separating the resulting two diasteromeric salts by way of the difference between their solubilities in the solvent or mixture of solvents. The difference in solubility may be enhanced by cooling, concentration, addition of a solubility-decreasing organic solvent, pH adjustment or salting out.
一种光学分辨DL-
氨基酸的方法,包括将DL-
氨基酸与具有光学活性的N-酰基
天冬氨酸在溶剂或溶剂混合物中反应,并通过其在溶剂或溶剂混合物中溶解度的差异分离所得的两个对映异构体盐。溶解度的差异可以通过冷却、浓缩、添加降低溶解度的有机溶剂、pH调节或盐析来增强。