FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridine-1(2H)-yl)methyl]imidazolidine-2,4-dione
including: (a) a step for separating an isomer represented by following formula (2)
from a mixture of isomers of formula (1); and
(b) a step for removing the mentyloxycarbonyl group of the compound, represented by formula (2) recovered at step (a), to obtain (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridine-1(2H)-yl)methyl]imidazolidine-2,4-dione.
EFFECT: invention discloses a method of producing (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridine-1(2H)-yl)methyl]imidazolidine-2,4-dione and an intermediate compound for obtaining.
3 cl, 2 dwg, 1 tbl, 4 ex
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