Process for racemization of N-acetyl-(D)L-.alpha.-amino carboxyl

Details Process for racemization of N-acetyl-(D)L-.alpha.-amino carboxyl Process for racemization of N-acetyl-(D)L-.alpha.-amino carboxyl

1998-06-10

2000-06-27

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562445, 562559, 562575, C07B 5500

Patent

active

06080887&

ABSTRACT:
With known methods of racemizing N-acetyl-D(L)-.alpha.-amino carboxylic acids in the non-aqueous state by heating them to temperatures above room temperatures, significant quantities of by-products are formed, especially acetyl dipeptides. By converting at least a proportion of the N-acetyl-D(L)-.alpha.-amino carboxylic acids to corresponding N-acetyl-D(L)-.alpha.-amino carboxylic acid salts before or during the heating, it is possible to increase the sojourn time of the educt which is to be racemized at higher temperatures without any evident increase in the quantity of by-product formed (in particular acetylated dipeptides). Also disclosed is the production of optically active amino acids by enzymatic splitting of racemic compounds.

REFERENCES:
patent: 4602096 (1986-07-01), Karrenbauer et al.
Baxter et al., The Journal of the American Chemical Society, vol. 54, No. 4, pp. 1629-1634, Apr. 1932.

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