Method of producing .alpha.-L-aspartyl-L-phenylalanine lower alk

Details Method of producing .alpha.-L-aspartyl-L-phenylalanine lower alk Method of producing .alpha.-L-aspartyl-L-phenylalanine lower alk

1974-12-20

1976-06-08

Gotts, Lewis

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C10352, A23L 122

Patent

active

039622070

ABSTRACT:
When hydrogen halide salts of L-aspartic anhydride are reacted with lower alkyl esters of L-phenylalanine to produce the corresponding L-aspartyl-L-phenylalanine esters, a significant increase in yield and in the proportion of the .alpha.-isomer to the .beta.-isomer is achieved when the reaction is carried out in the presence of a lower alkanol and of a strong acid, such as sulfuric acid, hydrogen chloride, or mono-esters of sulfuric acid with a lower alkanol.

REFERENCES:
patent: 3798206 (1974-03-01), Uchiyama et al.
patent: 3833553 (1974-09-01), Ariyoshi et al.
Kovacs et al.: J. Am. Chem. Soc., 85, 1839-1844 (1963).

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