Process for the racemization of N-acetyl-D,L-.alpha.-aminocarbox

Details Process for the racemization of N-acetyl-D,L-.alpha.-aminocarbox Process for the racemization of N-acetyl-D,L-.alpha.-aminocarbox

1985-08-12

1986-07-22

Trousof, Natalie

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562401, 562450, 562559, 562567, 562570, 562573, C07D20920, C07B 5500

Patent

active

046020969

ABSTRACT:
N-acetyl-D(L)-.alpha.-aminocarboxylic acids are thermally racemized by melting, adding a small amount of acetic anhydride to the melt and heating to a temperature between the melting temperature and about 210.degree. C. and subsequently quenching the melt with an aqueous alkali metal hydroxide or ammonia solution. The residence time needed for complete racemization depends on the heating temperature of the melt in the manner that the higher the heating temperature the shorter the residence time.

REFERENCES:
patent: 2071327 (1937-02-01), Bley
patent: 3213106 (1965-10-01), Sasaji et al.
patent: 3458568 (1969-07-01), Ogasawara et al.
patent: 3737454 (1973-06-01), Chibata et al.

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