反应详情

To a solution of (5-bromo-2-methoxy-phenyl)-methanol (3.38 g, 14.8 mmol) and 2-bromoethyl methyl ether (2.06 g, 14.8 mmol) in DMF (30 mL) is added NaH (55% dispersion in oil; 1.36 g, 31.1 mmol) in three portions at room temperature, followed by stirring overnight. The mixture is poured into ice-cooled aqueous 2N HCl, the water phase is extracted with diethyl ether, the combined organic phase is washed with brine, dried (Na2SO4) and concentrated. Purification by flash chromatography (hexane/AcOEt 3:1) gives the title compound as liquid. TLC, Rf (hexane/AcOEt 1:1)=0.44. 1H-NMR (CDCl3): δ 3.45 (s, 3H), 3.64 (m, 2H), 3.71 (m, 2H), 3.83 (s, 3H), 4.60 (s, 2H), 6.76 (d, 1H), 7.37 (dd, 1H), 7.56 (d, 1H) ppm.

1. additionThe mixture is poured into ice-
2. extractionthe water phase is extracted with diethyl ether
3. washthe combined organic phase is washed with brine
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated
6. customPurification by flash chromatography (hexane/AcOEt 3:1)