反应详情

To a solution of 6-bromo-4-phenyl-3-isocoumarincarboxylic acid methyl ester (539 mg) in methanol (10 ml) was added 3,5-dimethoxybenzylamine (1.25 g), and the mixture was stirred at room temperature for 12 hrs. The solvent was evaporated under reduced pressure and 1N hydrochloric acid was added. The mixture was extracted with ethyl acetate. The extract was washed with saturated brine and dried by adding sodium sulfate. The solvent was evaporated under reduced pressure, and 4N hydrogen chloride ethyl acetate solution (5 ml) was added to the obtained residue. The mixture was stirred at room temperature for 10 hrs. The solvent was evaporated under reduced pressure, water was added and the mixture was extracted with ethyl acetate. The extract was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated brine and dried by adding sodium sulfate. The obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=19/1→4/1) to give the title compound (555 mg, 73%).

1. customThe solvent was evaporated under reduced pressure and 1N hydrochloric acid
2. additionwas added
3. extractionThe mixture was extracted with ethyl acetate
4. washThe extract was washed with saturated brine
5. customdried
6. additionby adding sodium sulfate
7. customThe solvent was evaporated under reduced pressure, and 4N hydrogen chloride ethyl acetate solution (5 ml)
8. additionwas added to the obtained residue
9. stirringThe mixture was stirred at room temperature for 10 hrs
10. customThe solvent was evaporated under reduced pressure, water
11. additionwas added
12. extractionthe mixture was extracted with ethyl acetate
13. washThe extract was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated brine
14. customdried
15. additionby adding sodium sulfate
16. customThe obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=19/1→4/1)