反应详情

To a solution of 2-bromo-4-trifluoromethoxyphenol (7.2 g) and potassium carbonate (11.6 g, 0.084 mol) in dimethylformamide (60 ml) was added methyl iodide (14.94 ml, 0.24 mol). The solution was stirred for 15 hours at room temperature under nitrogen whereupon water (400 ml) and diethyl ether (200 ml) were added. The organic phase was washed with water (4×200 ml), saturated NaHCO3 (2×200 ml), brine (200 ml), and the solvent removed in vacuo. The residue was purified by chromatography on silica gel eluting with ethyl acetate in hexane (0-2%), to give the title compound; δH (250 MHz, CDCl3) 7.45 (1H, d, J 2.8Hz, 3-H), 7.16 (1H, dd, J 9.0, 2.8Hz, 5-H), 6.88 (1H, d, J 9.0Hz, 6-H), 3.90 (3H, s, ArOCH3).

1. additionwere added
2. washThe organic phase was washed with water (4×200 ml), saturated NaHCO3 (2×200 ml), brine (200 ml)
3. customthe solvent removed in vacuo
4. customThe residue was purified by chromatography on silica gel eluting with ethyl acetate in hexane (0-2%)