反应详情

AlCl3 (3.63 g, 27.2 mmol) was added portionwise to 4-bromo-3-methylbenzoyl chloride (5.30 g, 22.7 mmol) dissolved in anisole (7 mL) at 0° C. The reaction mixture was warmed to RT, stirred for 1 h, and then cooled to 0° C. Water (200 mL) was cautiously added dropwise, and the mixture was extracted with ether (3×100 mL). The combined ethereal extracts were washed with water (250 mL), brine (250 mL), and dried over MgSO4. Concentration followed by flash chromatography (20:1 to 5:1 hexanes:EtOAc) afforded 6.42 g (93%) of 65 as a white solid. 1H NMR (400 MHz, CDCl3): δ 2.45 (s, 3H), 3.88 (s, 3H), 6.96 (d, J=8.8 Hz, 2H), 7.40 (d, J=8.1 Hz, 1H), 7.62 (m, 2H), 7.79 (d, J=8.8 Hz, 2H).

1. temperaturecooled to 0° C
2. extractionthe mixture was extracted with ether (3×100 mL)
3. washThe combined ethereal extracts were washed with water (250 mL), brine (250 mL)
4. dry with materialdried over MgSO4
5. concentrationConcentration