反应详情

温度

0 °C

The 4-bromo-2-(1-methylcyclohexyl) phenol (9.26 g, 34.4 mmoles) is dissolved in 50 ml of THF. The solution is cooled to 0° C. and there is added in small fractions sodium hydride (80% in oil, 1.14 g, 37.8 mmoles). The reaction mixture is stirred for 30 minutes at ambient temperature and 5.37 g (37.8 mmoles) of methyl iodide are slowly added. Stirring is continued for 16 hours at which point water (300 ml) is added and the reaction mixture is extracted with ether (3×300 ml). The organic phase is washed with a saturated sodium bicarbonate solution and then with a saturated sodium chloride solution. The reaction mixture is dried on MgSO4, filtered and the solvents are evaporated. The residue is purified by chromatography on a silica column, eluted by a 20/80 mixture of dichloromethane and hexane, yielding 9 g (92% yield) of 4-bromo-2-(1-methylcyclohexyl) anisole in the form of a colorless oil.

1. stirringStirring
2. additionis added
3. extractionthe reaction mixture is extracted with ether (3×300 ml)
4. washThe organic phase is washed with a saturated sodium bicarbonate solution
5. customThe reaction mixture is dried on MgSO4
6. filtrationfiltered
7. customthe solvents are evaporated
8. customThe residue is purified by chromatography on a silica column
9. washeluted by a 20/80 mixture of dichloromethane and hexane