反应详情

4.18 g of manganese dioxide were added to a solution of 0.87 g of 1,4-dimethoxy-2-naphthylmethanol (prepared as described in Preparation 20) in 10 ml of methylene chloride, and the resulting mixture was stirred at room temperature for 6.5 hours. At the end of this time, the reaction mixture was filtered to remove inorganic materials, and the filtrate was dried over anhydrous sodium sulfate, after which the solvent was removed by distillation under reduced pressure. The resulting crystalline residue was washed with hexane and air-dried, to give 0.57 g of the title compound as pale yellow needles, melting at 120°-123° C.

1. filtrationAt the end of this time, the reaction mixture was filtered
2. customto remove inorganic materials
3. dry with materialthe filtrate was dried over anhydrous sodium sulfate
4. customafter which the solvent was removed by distillation under reduced pressure
5. washThe resulting crystalline residue was washed with hexane
6. customair-dried