反应详情

温度

0 °C

To a solution of 1-{4-bromo-5-methyl-2-[(phenylmethyl)oxy]phenyl}ethanone (may be prepared as described in Description 11; 607 mg, 1.90 mmol) in 1,4-dioxane (10 ml) was added sodium hydroxide (761 mg, 19.02 mmol) in water (10 ml). The solution was cooled to 0° C. and bromine (0.29 ml, 5.71 mmol) was added. The mixture was stirred for 10 minutes at 0° C. and then at room temperature for one hour. The dioxane was removed under reduced pressure and the residue acidified to pH=2 using 2N HCl. The mixture was extracted with ethyl acetate (3×20 ml), dried (MgSO4) and the solvent removed in vacuo to yield the title compound. 611 mg.

1. waitat room temperature for one hour
2. customThe dioxane was removed under reduced pressure
3. extractionThe mixture was extracted with ethyl acetate (3×20 ml)
4. dry with materialdried (MgSO4)
5. customthe solvent removed in vacuo