Method for producing (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridin-1(2H)-yl)methyl]imidazolidine-2,4-dione and intermediate for producing same
申请人:KAKEN PHARMACEUTICAL CO., LTD.
公开号:US10640484B2
公开(公告)日:2020-05-05
A method for producing (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridin-1(2H)-yl)methyl]imidazolidine-2,4-dione, the method comprising, (a) a step for isolating an isomer represented by formula (2) from a mixture of isomers represented by formula (1), and (b) a step for obtaining (R)-5-(3,4-difluorophenyl)-5-[(3-methyl-2-oxopyridin-1(2H)-yl)methyl]imidazolidine-2,4-dione by removing the menthyloxycarbonyl group from the compound represented by formula (2), which was isolated in step (a).
一种生产(R)-5-(3,4-二氟苯基)-5-[(3-甲基-2-氧代吡啶-1(2H)-基)甲基]咪唑烷-2,4-二酮的方法,该方法包括:(a)从式(1)代表的异构体混合物中分离出式(2)代表的异构体的步骤、和 (b) 从在步骤(a)中分离的式(2)代表的化合物中除去薄荷氧羰基,得到(R)-5-(3,4-二氟苯基)-5-[(3-甲基-2-氧代吡啶-1(2H)-基)甲基]咪唑烷-2,4-二酮的步骤。