[EN] PROCESSES FOR THE PREPARATION OF ROXADUSTAT AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉS DESTINÉS À LA PRÉPARATION DE ROXADUSTATE ET SES INTERMÉDIAIRES
申请人:TEVA PHARMACEUTICALS INT GMBH
公开号:WO2021026307A1
公开(公告)日:2021-02-11
The present invention provides new procedure and intermediates for the preparation of Roxadustat (1) comprising: (A) reducing a compound of formula 3', 3" or a mixture thereof: (3'), (3") wherein Pg is H or a OH protecting group, Ri is alkyl, aryl, or arylalkyl; R2, R3, R4, and Rs each independently represents alkyl, arylalkyl or alkenyl, or R2 and R3 and/or R4 and Rs, taken together with the nitrogen atom to which they are bonded, each independently form a ring selected from: (I), wherein R6 is H or CI- 6 alkyl; R7 is Ci to C6 alkyl and X- is an anion selected from the group consisting of halide, O-SO4 -R7 wherein R7 is Ci to C6 alkyl, or O-SO2 -Rs wherein Rs is phenyl, tolyl, methyl or trifluoromethyl; to form a compound of formula (2') wherein Pg is H or an OH protecting group, Ri is alkyl, aryl, or arylalkyl; and removing the Ri group and where present removing the OH protecting group; or (B) reducing a compound of formula 4', a compound of formula 4" or a mixture thereof: (4'), (4") wherein Pg is H or an OH protecting group; Ri is H, alkyl, aryl, or arylalkyl; R2, R3, R4, and R5 each independently represents alkyl, aryl, arylalkyl or alkenyl; or R2 is Ci-4 alkyl and R3 is Ci-4 alkoxy; or R2 and R3 and/or R4 and R5, taken together with the nitrogen atom to which they are bonded, each independently form a group selected from: (I) wherein R6 is H or CI-6 alkyl; and where Ri is not H, removing the Ri group, and, where present removing the OH protecting group.
本发明提供了制备罗沙度胺(1)的新程序和中间体,包括:(A)还原式3'、3"或其混合物的化合物:(3')、(3"),其中Pg为H或OH保护基,Ri为烷基、芳基或芳基烷基;R2、R3、R4和Rs分别独立表示烷基、芳基烷基或烯基,或者R2和R3和/或R4和Rs与它们连接的氮原子一起,各自独立地形成从选定的环中选择的环:(I),其中R6为H或CI-6烷基;R7为Ci至C6烷基,X-为从卤素、O-SO4-R7(其中R7为Ci至C6烷基)或O-SO2-Rs(其中Rs为苯基、甲苯基、甲基或三氟甲基)中选择的阴离子;形成式(2')的化合物,其中Pg为H或OH保护基,Ri为烷基、芳基或芳基烷基;并去除Ri基团和如有的话去除OH保护基;或(B)还原式4'、4"或其混合物的化合物:(4')、(4"),其中Pg为H或OH保护基;Ri为H、烷基、芳基或芳基烷基;R2、R3、R4和R5各自独立表示烷基、芳基、芳基烷基或烯基;或R2为Ci-4烷基,R3为Ci-4烷氧基;或者R2和R3和/或R4和R5与它们连接的氮原子一起,各自独立地形成从选定的组中选择的组:(I),其中R6为H或CI-6烷基;并且如果Ri不是H,则去除Ri基团,并在有的情况下去除OH保护基。