反应详情

To a solution of p-cresol (3.50 g, 32.3 mmol) in DMF (70 mL) was added sodium hydride (a 60% liquid paraffin dispersion, 1.42 g, 35.5 mmol) under nitrogen atmosphere at 0° C., and the mixture was stirred at the same temperature for 30 minutes. To the reaction solution was added 1-(3-bromo-2-methyl-1-propenyl)-4-isopropyl benzene (9.0 g, 35.5 mmol), and the mixture was stirred at room temperature for 3 hours. Water was added to the reaction solution, and the product was extracted with diisopropyl ether. The extract was washed with water, dried over magnesium sulfate, and then concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=20:1) to obtain 8.20 g (yield 91%) of the title compound. Oily matter.

1. stirringthe mixture was stirred at room temperature for 3 hours
2. extractionthe product was extracted with diisopropyl ether
3. washThe extract was washed with water
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=20:1)