ethyl 7-ethoxy-3-hydroxy-3,3a,4,5-tetrahydro-benzo-2,1-isoxazole-3-carboxylate 在
silica gel 、
ethyl acetate n-hexane 作用下,
以
乙醇 、
盐酸 为溶剂,
反应 2.0h,
以to afford 0.380 g (35% yield) of the title compound as a white solid的产率得到ethyl 7-oxo-4,5,6,7-tetrahydrobenzo-2,1-isoxazole-3-carboxylate