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:US20190276428A1
公开(公告)日:2019-09-12
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).
一种制备(R)-5-(3,4-二氟苯基)-5-[(3-甲基-2-氧代吡啶-1(2H)-基)甲基]咪唑啉-2,4-二酮的方法,包括:(a)从由式(1)表示的异构体混合物中分离出由式(2)表示的异构体的步骤,和(b)通过从在步骤(a)中分离出的由式(2)表示的化合物中去除menthyloxycarbonyl基团来获得(R)-5-(3,4-二氟苯基)-5-[(3-甲基-2-氧代吡啶-1(2H)-基)甲基]咪唑啉-2,4-二酮的步骤。