Method of purifying .alpha.-L-aspartyl-L-phenylalanine methyl es

Details Method of purifying .alpha.-L-aspartyl-L-phenylalanine methyl es Method of purifying .alpha.-L-aspartyl-L-phenylalanine methyl es

1993-01-12

1995-07-11

Hill, Jr., Robert J.

Chemistry: natural resins or derivatives; peptides or proteins;

Peptides of 3 to 100 amino acid residues

Separation or purification

530801, 560 40, 560 41, 562445, 562571, A61K 3702, C07K 100, C07K 506, C07C10132

Patent

active

054322626

ABSTRACT:
Mixture containing .alpha.-L-aspartyl-L-phenylalanine methyl ester and 3-benzyl-6-carboxymethyl-2,5-dioxopiperazine are brought into contact with hydrochloric acid in an aqueous solvent to precipitate .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride and 3-benzyl-6-carboxymethyl-2,5-dioxopiperazine, which are then separated from each other by classification.

REFERENCES:
patent: 4309341 (1982-01-01), Kubo et al.
patent: 4634790 (1987-01-01), Shinohara et al.
patent: 4780561 (1988-10-01), Mita et al.
patent: 4897507 (1990-01-01), Takahashi et al.

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