(4S,6S)-4-(3-amino-2,6-difluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、
5-氰基-2-吡啶羧酸 以to give N-(3-((4S,6S)-2-amino-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-2,4-difluorophenyl)-5-cyanopicolinamide (Example 38, 32 mg) as a colorless solid的产率得到N-(3-((4S,6S)-2-amino-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-2,4-difluorophenyl)-5-cyanopicolinamide