反应详情

To a solution of 1.6 g of [2-(3-bromophenyl)ethoxy](tert-butyl)dimethylsilane in tetrahydrofuran (20 ml) was added n-BuLi in hexane (1.57M, 3.88 ml) at −70° C., then the reaction mixture was stirred at same temperature for 30 min. To the solution was added dimethylacetamide (1.42 ml) drop wise at the same temperature. The mixture was stirred for another 1 hour. To the reaction mixture were added water and 8 ml of 1N HCl under ice-cooling. The mixture was stirred for 1 hour, then extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography with n-hexane and ethyl acetate (20/1–10/1) as an eluent to give 1-[3-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)phenyl]ethanone (350 mg) as colorless oil.

1. stirringThe mixture was stirred for another 1 hour
2. temperaturecooling
3. stirringThe mixture was stirred for 1 hour
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with brine
6. dry with materialdried over magnesium sulfate
7. concentrationconcentrated in vacuo
8. customThe residue was purified by silica gel column chromatography with n-hexane and ethyl acetate (20/1–10/1) as an eluent