Methyl iodide → 3-Bromo-5-fluoro-2-methoxypyridine

Beteiligte Stoffe

Reaktionsschritte

3-Bromo-5-fluoropyridin-2(1H)-one (10.0 g, 52.1 mmol) and Ag2CO3 (10.0 g, 36.5 mmol) were combined in toluene (100 mL) and iodomethane (3.89 mL, 62.5 mmol) was added drop-wise. The reaction was stirred at ambient temperature overnight, filtered through Celite and the solids were washed with toluene. The filtrate was concentrated and the residue was purified on a silica gel column (5-25% EtOAc/hexanes) to afford 3-bromo-5-fluoro-2-methoxypyridine (4.70 g, 43.8%) as a clear oil.

Herkunft & Nachweise