反应详情

温度

-78 °C

To a solution of compound 2-(4-bromo-2-fluorophenyl)vinyl methyl ether (115.5 g, 0.5 mol) in tetrahydrofuran (666 mL) at −78° C. was added n-butyllithium (240 mL of 2.5M in hexanes, 0.6 mol), and the resulting mixture was stirred at −78° C. for 1 hour. A solution of acetone (37.7 g, 0.65 mol) in tetrahydrofuran (280 mL) was added dropwise to the reaction mixture. Then the reaction solution was slowly warmed to 0° C., stirred for 30 minutes, and then at room temperature for 30 minutes. Water (300 mL) was added to quench the reaction. The biphasic mixture was extracted with ethyl acetate (2×). The combined organics were dried and concentrated in vacuo. Purification via flash chromatography afforded the title compound.

1. temperatureThen the reaction solution was slowly warmed to 0° C.
2. stirringstirred for 30 minutes
3. waitat room temperature for 30 minutes
4. customto quench
5. customthe reaction
6. extractionThe biphasic mixture was extracted with ethyl acetate (2×)
7. customThe combined organics were dried
8. concentrationconcentrated in vacuo
9. customPurification via flash chromatography