METHOD OF PREPARING FREE ALPHA-HYDROXY ACIDS FROM AMMONIUM SLATS THEREOF (VARIANTS) Russian patent published in 2001 - IPC

Abstract RU 2165407 C2

FIELD: organic chemistry. SUBSTANCE: described is method of preparing alpha- hydroxy acids by heating ammonium salts of alpha-hydroxy acids of general formula I: R-CH(OH)-COO^-NH+4

wherein R is C₁-C₆ alkyl which is substituted by thioalkyl group, or phenyl removing the resulting ammonia and water and optionally organic solvent, subsequently adding water to residue and heating the resulting mixture. Method makes it possible to prepare free alpha-hydroxy acids from ammonium salts thereof using efficient method, and high yield of product is attained. EFFECT: more efficient preparation method. 3 cl, 11 ex, 14 tbl

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RU 2 165 407 C2

Authors

Khajakava Koiti

Dates

2001-04-20—Published

1997-02-25—Filed