ethyl 7-ethoxy-7a-hydroxy-3a,4,5,7a-tetrahydrobenzo-1,2-isoxazole-3-carboxylate 在
silica gel 、
ethyl acetate n-hexane 作用下,
以
乙醇 、
盐酸 为溶剂,
反应 48.0h,
以to afford 1.3 g (50% yield) of the title compound as a white solid的产率得到ethyl 7-oxo-4,5,6,7-tetrahydrobenzo-1,2-isoxazole-3-carboxylate