Method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl e

Details Method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl e Method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl e

1990-06-14

1993-04-27

Wax, Robert A.

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

Organic compounds

Carboxylic acid esters

562445, 562571, C07C22900, A61K 3700

Patent

active

052064131

ABSTRACT:
A method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester (.alpha.-APM), substantially free from acid ion contamination, is disclosed which comprises the steps of contacting a solution of a mineral acid salt or an organic sulfonic acid salt of .alpha.-APM in an aqueous solvent with an anion exchange resin in free base form, separating the resin from the thus-produced solution of .alpha.-APM; and isolating the .alpha.-APM therefrom, preferably with regeneration and recycling the resin.

REFERENCES:
patent: 3833554 (1974-09-01), Ariyoshi et al.
patent: 4309341 (1982-01-01), Kubo et al.

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