Potassium Carbonate → 1-Bromo-2-(2-fluoroethoxy)-4-nitrobenzene

Participants

Reaction Conditions

Reaction Steps

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).

Provenance & Evidence