(+/-)-1-(2-amino-6-chlorophenyl)propan-1-ol 、
乙酸乙酯 以
hexanes 为溶剂,
以to afford 0.14 g (73%) of (±)-5-chloro-4-ethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one after flash chromatography (4:1 hexanes:ethyl acetate)的产率得到(+/-)-5-chloro-4-ethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one