反应详情

温度

100 °C

Intermediate 16A (475 mg, 2.179 mmol) was dissolved in DMF (1 mL) and to this solution was added potassium carbonate (903 mg, 6.54 mmol) and 1-bromo-2-fluoroethane (415 mg, 3.27 mmol). The reaction mixture was stirred at 100° C. for 3 hours, cooled, diluted with water (20 mL) and then extracted with EtOAc (2×20 mL). The combined organics were washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. Intermediate 16B was obtained as a pale yellow semi-solid (570 mg, 2.159 mmol, 99% yield). MS (ES): m/z=199.0 [M+H]+. 1H NMR (400 MHz, DMSO-d6) δ ppm 4.47-4.51 (m, 1 H) 4.55-4.59 (m, 1 H) 4.73-4.78 (m, 1 H) 4.85-4.91 (m, 1 H) 7.77-7.83 (m, 1 H) 7.91 (d, J=2.51 Hz, 1 H) 7.94 (d, J=8.53 Hz, 1 H).

1. temperaturecooled
2. extractionextracted with EtOAc (2×20 mL)
3. washThe combined organics were washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated under reduced pressure