Process for producing optically active phenylalanine

Details Process for producing optically active phenylalanine Process for producing optically active phenylalanine

1985-03-27

1986-04-15

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

562402, 562443, C07B 1900

Patent

active

045829284

ABSTRACT:
This invention relates to a process for producing optically active phenylalanine, characterized by optically resolving DL-phenylalanine.optically active mandelic acid complexes in an aqueous solvent in the presence of an acidic compound having a pKa value of 0.90 to 2.10 and isolating optically active phenylalanine from the obtained optically active phenylalanine.optically active mandelic acid complex.
According to the process of the present invention, it is possible to decrease the amount of a mother liquor of resolution to 1/5 to 1/10 of that when no acidic compound is used and to obtain optically active phenylalanine having an optical purity of as high as 96.5% or above without a step of optical purification when optically active phenylalanine is isolated from the obtained optically active phenylalanine.optically active mandelic acid complex.

REFERENCES:
patent: 3492347 (1970-01-01), Chemerda et al.
patent: 4224239 (1980-09-01), Tashiro et al.

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