Method for purifying .alpha.- L-aspartyl-L-phenylalanine lower a

Details Method for purifying .alpha.- L-aspartyl-L-phenylalanine lower a Method for purifying .alpha.- L-aspartyl-L-phenylalanine lower a

1980-04-09

1982-01-05

Phillips, Delbert R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C10352

Patent

active

043093418

ABSTRACT:
A method for purifying an .alpha.-L-aspartyl-L- phenylalanine lower alkyl ester containing impurities. The .alpha.-L-aspartyl-L-phenylalanine lower alkyl ester is brought into contact with a Cl-type anion exchange resin in an aqueous medium to have the impurities adsorbed by the anion exchange resin. The impurities contained in the .alpha.-L-aspartyl-L-phenylalanine lower ester, particularly diketopiperazine and .alpha.-L-aspartyl-L-phenylalanine are selectively and easily removed. The desired matter thus can be easily recovered and disposal of waste liquid, etc. can also be carried out without difficulty.

REFERENCES:
patent: 3798206 (1974-03-01), Uchiyama et al.
patent: 3798207 (1974-03-01), Ariyoshi et al.
patent: 3962207 (1976-06-01), Uchiyama et al.
A. Yasutaki, et al., Bull. Chem. Soc. Japan 50, (1977) 2413-2416.
J. W. Bridges, et al. Progress in Drug Metabolism vol. 2, 219-222 1977.

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