FIELD: chemistry.
SUBSTANCE: invention relates to method of obtaining mixture of compounds, which have formulas 
, 
and/or 
, with molar ratio of formula Ia and Ib compounds from 1:2 to 2:1, where R represents linear or branched aliphatic alkyl radical, containing from 1 to 6 carbon atoms, in which stereoisomerically pure compound of formula Ia, Ib or Ic or mixture of two or three compounds is mainly or completely converted with catalyst or mixture of at least two catalysts.
EFFECT: invention relates to method of obtaining amorphous polyactides, namely obtaining sterecomplex lactic acid and/or stereoblock-copolymers of lactic acid, with application of obtained mixture.
11 cl, 7 tbl, 7 ex
