(4S,6S)-4-(2-fluoro-5-iodophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、
5-Chloro-6-((trimethylsilyl)ethynyl)nicotinonitrile 以to give 6-((3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)ethynyl)-5-chloronicotinonitrile as light brown solid的产率得到6-((3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)ethynyl)-5-chloronicotinonitrile