反应详情

温度

60 °C

A mixture of 2-chloro-N-methoxy-N-methylacetamide (2.7 g, 19.63 mmol), 4-bromo-2-methoxyphenol (3.98 g, 19.63 mmol), and potassium carbonate (5.43 g, 39.3 mmol) in DMF (20 mL) was heated at 60° C. for 1 hour and stirred at RT overnight (16 hours). The reaction mixture was diluted with CH2Cl2, washed with sat NaHCO3, brine and dried (Na2SO4). After concentration, the crude product was purified by ISCO flash chromatography (silica gel/hexanes-ethyl acetate 100:0 to 0:100 gradient) to afford 2-(4-bromo-2-methoxyphenoxy)-N-methoxy-N-methylacetamide 16A (4.86 g, 15.98 mmol, 81% yield) as a yellow solid. 1H NMR (400 MHz, chloroform-d) δ 6.97-7.04 (2H, m), 6.76 (1H, d, J=8.03 Hz), 4.86 (2H, s), 3.87 (3H, s), 3.75 (3H, s), 3.23 (3H, s).

1. washwashed
2. dry with materialdried (Na2SO4)
3. concentrationAfter concentration
4. customthe crude product was purified by ISCO flash chromatography (silica gel/hexanes-ethyl acetate 100:0 to 0:100 gradient)