FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing a compound of formula (I) and ent- (I) by electrochemical reduction of compounds of formulas (XVII), or M1a (S), or M1b (R), or a mixture of M1a (S) and M1b (R). Invention also relates to methods of producing compounds of formulas (XVII), M1a (S) and M1b (R).
EFFECT: technical result is a method of producing a compound of formula (I), characterized by high output and purity.
8 cl, 9 dwg, 3 tbl, 32 ex
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