Process for preparing amino-polycarboxylic acids or salts thereo

Details Process for preparing amino-polycarboxylic acids or salts thereo Process for preparing amino-polycarboxylic acids or salts thereo

1994-09-15

1996-08-06

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C22904

Patent

active

055435661

ABSTRACT:
Aspartic acid is reacted with prussic acid and formaldehyde to give an amino-polycarboxylic acid or a salt thereof represented by-the following formula: ##STR1## wherein each of R.sup.1 and R.sup.2 represents a hydrogen atom, an alkali metal or an ammonium group; and each of R.sup.3 and R.sup.4 represents a hydrogen atom or --CH.sub.2 --COOR.sup.1, provided that R.sup.3 and R.sup.4 do not represent a hydrogen atom simultaneously. The amino-polycarboxylic acid which is readily biodegradable and has an excellent chelating ability can be obtained from aspartic acid in a high yield and in a high purity.

REFERENCES:
patent: 2538024 (1951-01-01), McKinney et al.
patent: 2562198 (1951-07-01), McKinney et al.
patent: 3637511 (1972-01-01), Yang
J. Am. Chem. Soc., 72, 2599 (1950), Cyanoethylation of Alpha Amino Acids, I. Monocyanoethyl Derivatives, McKinney et al.
J. Am. Chem. Soc., 73, 1641 (1951), Cyanoethylation of Alpha Amino Acids, II. Dicyanoethyl and Tricyanoethyl Derivatives, McKinney et al.
J. Am. Chem. Soc., 74, 1942 (1952), Cyanoethylation of Alpha Amino Acids, III. Hydrolysis of Cyanoethyl Derivatives, McKinney et al.
Chemical Abstracts, vol. 91, 21006a (1979), p. 706.
Chemical Abstracts, vol. 94, 175453t (1981), p. 768.
Chemical Abstracts, vol. 72, 25711g (1970), pp. 340-341.

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