6-chloro-4-(2-phenylethynyl)-4-(trifluoromethyl)-1H-3,1-benzoxazin-2-one 、
1,7,7-trimethyl-norbornane-2-carbonyl chloride 、
三乙胺 、
二氯甲烷 在
4-二甲氨基吡啶 ice 、
氩 、
氯仿 、
柠檬酸 、
magnesium sulfate 作用下,
以There was obtained 575 mg of diastereomer I of 6-chloro-(1S)-camphanoyl-4-phenylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as an oil, 1H-NMR (CDCl3): δ 0.85 (s, 3H), 1.08 (s, 3H), 1.22 (s, 3H), 1.73-1.85 (m, 1H), 1.92-2.08 (m, 1H), 2.50-2.67 (m, 2H), 7.30-7.79 (m, 8H)的产率得到6-chloro-(1S)-camphanoyl-4-phenylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one