3,4-difluoro-2-{2-fluoro-4-[(methylamino)carbonyl]anilino}benzoic Acid 、
2-氨氧基乙醇 、
4-(4,6-二甲氧基三嗪-2-基)-4-甲基吗啉盐酸盐 在
2-{2-fluoro-4-[(methylamino)carbonyl]anilino}-3,4-difluoro-N-(2-hydroxyethoxy)benzamide 、 silica gel 、
methanol-dichloromethane 作用下,
以to give 2-{2-fluoro-4-[(methylamino)carbonyl]anilino}-3,4-difluoro-N-(2-hydroxyethoxy)benzamide as a crystalline cream solid (45%)的产率得到2-{2-fluoro-4-[(methylamino)carbonyl]anilino}-3,4-difluoro-N-(2-hydroxyethoxy)benzamide