PREPARATION OF (R)- AND (S)-N-(3, 4-DIFLUORO-2-(2-FLUORO-4-IODOPHENYLAMINO)--6-METHOXYPHENYL) -1- (2, 3-DIHYDROXYPROPYL)CYCLOPROPANE-1-SULFONAMIDE AND PROTECTED DERIVATIVES THEREOF

摘要

The present invention relates to the preparation of (R)—N-(3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-6-methoxyphenyl)-1-(2,3-dihydroxypropyl)cyclopropane-1-sulfonamide and (S)-N-(3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-6-methoxyphenyl)-1-(2,3-dihydroxypropyl)cyclopropane-1-sulfonamide.