| abstract |
(57) [Summary] [Structure] Aspartic acid, hydrocyanic acid, glycolonitrile, A compound having a nitrile group such as acrylonitrile or a halogenocarboxylic acid is reacted to give a compound represented by the following general formula (in the formula, R 1 and R 2 represent a hydrogen atom, an alkali metal or an ammonium group, and R 3 and R 4 Represents a hydrogen atom or — (CH 2 ) n COO R 1 (n is 1 to 3), provided that R 3 and R 4 are not hydrogen atoms at the same time. [Effect] Aminopolycarboxylic acids which are rich in biodegradability and have excellent chelating ability can be obtained from aspartic acid in high yield and high purity. |