反应详情

To a solution of ethyl (3-ethoxy-2-oxocyclohex-3-en-1-yl)(oxo)acetate 5.0 g (20.73 mmol) in 20 mL of EtOH and 5 mL of AcOH, 1.3 mL (20.78 mmol) of HONH2.H2O (50% wt/wt) was added. The mixture was stirred at room temperature for 4 hours. The solvent was removed under reduced pressure and the crude solid was purified by flash chromatography on silica gel (eluant: AcOEt/Hexane:3/7) to afford 1.35 g (25% yield) as a white solid of ethyl 7-ethoxy-7a-hydroxy-3a,4,5,7a-tetrahydro-1,2-benzisoxazole-3-carboxylate

1. customThe solvent was removed under reduced pressure
2. customthe crude solid was purified by flash chromatography on silica gel (eluant: AcOEt/Hexane:3/7)