3,4-dihydro-7-fluoro-6-isocyanato-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazine 、
6,7-dihydro-5H-cyclopenta-1,3-dioxin-4-one 以
邻二氯苯 为溶剂,
生成 3-(7-fluoro-4-propargyl-3,4-dihydro-3-oxo-2H-1,4-benzoxazin-6-yl)-2,3,4,5,6,7-hexahydrocyclopenta[e]-1,3-oxazine-2,4-dione