反应详情

6-Methoxy-2-(2-propenyloxy)naphthalene (24.9 g, 116.2 mmol) was dissolved in N,N-dimethyl aniline (100 ml) followed by heating under reflux for 15 hours. After the organic solvent was distilled off under reduced pressure, 2N aqueous hydrochloric acid was added to the residue, which was then extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride and dried over anhydrous sodium sulfate. After distilling off the solvent, the residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/4), followed by recrystallization from ethyl acetate/hexane, to give 6-methoxy-1-(2-propenyl)-2-naphthol (20.3 g, Yield 82%).

1. temperatureby heating
2. temperatureunder reflux for 15 hours
3. distillationAfter the organic solvent was distilled off under reduced pressure, 2N aqueous hydrochloric acid
4. additionwas added to the residue, which
5. extractionwas then extracted with ethyl acetate
6. washThe organic layer was washed with saturated aqueous sodium chloride
7. dry with materialdried over anhydrous sodium sulfate
8. distillationAfter distilling off the solvent
9. customthe residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/4)
10. customfollowed by recrystallization from ethyl acetate/hexane