Optical resolution of alkyl esters of DL-phenylalanine

Details Optical resolution of alkyl esters of DL-phenylalanine Optical resolution of alkyl esters of DL-phenylalanine

1975-01-02

1976-09-28

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 9912

Patent

active

039831620

ABSTRACT:
Treatment of an alkyl ester of DL-phenylalanine with an N-acyl-D-phenylalanine results in the formation of the corresponding insoluble salt of L-phenylalanine alkyl ester and N-acyl-D-phenylalanine. The salt is purified by recrystallization in the presence of an added quantity of the alkyl ester of DL-phenylalanine or the alkyl ester of L-phenylalanine. The isolated, purified salt is decomposed to afford the desired L-phenylalanine alkyl ester, which is an important starting material in the preparation of artificial sweetening agents.

REFERENCES:
patent: 3832388 (1974-08-01), Lorenz

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