Disclosed in the present specification is a method capable of preparing N-[4-[(1R)-1-[[(R)-(1,1-dimethylethyl)sulfinyl]amino]ethyl]-2,6-difluorophenyl]-methanesulfonamide (INT028-2) with high optical purity, through the selection of Ellman-chiral auxiliaries and the re-crystallization and separation of optical isomers. According to the above method, high-purity N-[4-[(1R)-1-[[(R)-(1,1-dimethylethyl)sulfinyl]amino]ethyl]-2,6-difluorophenyl]-methanesulfonamide with excellent quality can be produced at room temperature by improving cryogenic process conditions necessary for realizing high optical purity, and thus the trimming due to the process failure rate can be remarkably reduced.
本说明书公开了一种方法,通过选择Ellman手性辅助剂和光学异构体的重结晶和分离,能够制备具有高光学纯度的N-[4-[(1R)-1-[[(R)-(
1,1-二甲基乙基)亚磺酰基]
氨基]乙基]-2,6-二
氟苯基]-甲磺酰胺(
INT028-2)。根据上述方法,在改善实现高光学纯度所必需的低温过程条件的情况下,可以在室温下生产具有优异质量的高纯度N-[4-[(1R)-1-[[(R)-(
1,1-二甲基乙基)亚磺酰基]
氨基]乙基]-2,6-二
氟苯基]-甲磺酰胺,从而可以显着降低由于工艺失效率而导致的修剪。