Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl

Details Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl

1989-01-25

1990-10-09

Gray, Bruce

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

Organic compounds

Carboxylic acid esters

C07C10102

Patent

active

049622226

ABSTRACT:
.alpha.-L-Aspartyl-L-phenylalanine methyl ester having low hygroscopicity is prepared by bringing a cake of .alpha.-L-aspartyl-L-phenylalanine methyl ester, which cake has been obtained by solid-liquid separation through a desired preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester, into contact with an organic solvent of uniform phase so as to treat the cake with the organic solvent, subjecting the resulting mixture of the cake and organic solvent to solid-liquid separation to obtain a cake, and then drying the last-mentioned cake at a temperature not higher than 60.degree. C. The organic solvent is dry or contains water in an amount up to 30 wt.%.

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patent: 4634790 (1987-01-01), Shinohara et al.
patent: 4835301 (1989-05-01), Wakamatsu et al.
Chemical Abstracts, 105:153551s (1986).
English-Language abstract (World Patent Index) of JP 58-185545.

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