反应详情

温度

0 °C

Place (2-bromo-5-fluoro-phenyl)-carbamic acid tert-butyl ester (2.00 g, 6.90 mmol) and dimethylformamide (40 mL) in a round bottom flask. Cool the solution to 0° C., add sodium hydride (60% dispersion in mineral oil) (0.303 g, 7.59 mmol), remove the ice bath and stir this suspension for 25 minutes allowing it to warm slowly towards ambient temperature. Cool the resulting mixture to 0° C. once again, and add iodomethane (0.56 mL, 8.96 mmol). Stir the resulting mixture overnight, allowing it to warm to ambient temperature. Quench the reaction with brine and extract the resulting mixture into ethyl acetate. Combine the extracts and wash with brine; then dry (sodium sulfate) and concentrate in vacuo. Purify the resulting material by flash chromatography (silica gel; 35%-50% dichloromethane gradient in hexanes) to provide the desired product.

1. customremove the ice bath
2. temperatureto warm slowly towards ambient temperature
3. temperatureCool the resulting mixture to 0° C. once again
4. stirringStir the resulting mixture overnight
5. temperatureto warm to ambient temperature
6. customQuench
7. customthe reaction with brine
8. extractionextract the resulting mixture into ethyl acetate
9. washwash with brine
10. dry with materialthen dry (sodium sulfate)
11. concentrationconcentrate in vacuo
12. customPurify the resulting material by flash chromatography (silica gel; 35%-50% dichloromethane gradient in hexanes)