METHOD OF SYNTHESIS OF CARNOSINE Russian patent published in 1995 - IPC

Abstract RU 2030422 C1

FIELD: organic chemistry. SUBSTANCE: synthesis is carried out from β-alanine amino-group of which is protected by addition of tert.-butylhydroxycarbonyl-group following by activation of prepared derivative with alkylchloroformate and N-hydroxysuccinimide. N-Tert. -butoxycarbonyl-b-alanine N-hydroxysuccinimide ester is used for acylation of L-histidine in neutral aqueous-organic medium following by isolation of the end product at neutralization at isoelectric point. Under these conditions the yield of the end product is increased from 40 to 50%, m. p. is increased up to 259-263 C, specific rotation is [α]2D

0 = +22 degrees. Clearing effect is increased in the case of human lens opacity. Use of strong bases causing side-effects is excluded. Number of stages in process is diminished. EFFECT: increased activity and quality of the end product, ecological purity of process and its simplification.

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RU 2 030 422 C1

Authors

Skoblik T.I.

Markin A.Ju.

Zaborina T.G.

Filippovich E.I.

Zheltukhina G.A.

Evstigneeva R.P.

Babizhaev M.A.

Sharkov V.Ja.

Dates

1995-03-10Published

1990-04-27Filed