反应详情

To a solution of 5-bromo-2-methoxybenzyl alcohol (1.0 g, 4.6 mmol) and imidazole (470 mg, 7.01 mmol) in DMF (15 ml) was added tert-butyldimethylsilyl chloride (1.04 g, 6.91 mmol). The mixture was allowed to stir for 4 h, poured onto water (100 ml) and extracted with ether (3×30 ml). The combined organic phases were washed with water (50 ml), brine (50 ml), dried over sodium sulfate and evaporated under reduced pressure to leave a pale yellow oil. This was purified by chromatography (SiO2, 5% ether/petrol), to give the title compound (1.46 g, 96%) as a colourless oil.

1. additionpoured onto water (100 ml)
2. extractionextracted with ether (3×30 ml)
3. washThe combined organic phases were washed with water (50 ml), brine (50 ml)
4. dry with materialdried over sodium sulfate
5. customevaporated under reduced pressure
6. customto leave a pale yellow oil
7. customThis was purified by chromatography (SiO2, 5% ether/petrol)