FIELD: chemistry.
SUBSTANCE: invention relates to a method for producing a compound by the formula (III). Invention also relates to a compound by the formula (III). Compound by the formula (III) is produced by executing the following stage (g): at stage (g), a compound by the formula (IV) reacts with a chiral base Y, forming a compound by the formula (III). (1S,2S)-cyclohexanediamine, (1R,2R)-cyclohexanediamine, quinine, or quinidine are selected as said chiral base Y.
EFFECT: higher total output and productivity, and higher safety of the method.
13 cl, 13 ex
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