(4S,6S)-4-(2-fluoro-5-iodophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、 1-ethyl-4-((trimethylsilyl)ethynyl)-1H-pyrazole 以to give (4S,6S)-4-(5-((1-ethyl-1H-pyrazol-4-yl)ethynyl)-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine as an off-white amorphous solid的产率得到(4S,6S)-4-(5-((1-ethyl-1H-pyrazol-4-yl)ethynyl)-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine