反应详情

温度

90 °C

A mixture of 1-bromo-4-isopropoxybenzene (16-3, 3.02 g, 14.0 mmol), 1-(4-hydroxy-2,6-dimethylphenyl)ethanone (4-2, 3.54 g, 21.6 mmol), N,N-dimethylglycine HCl salt (0.50 g, 3.5 mmol), copper iodide (0.34 g, 1.8 mmol), and cesium carbonate (9.08 g, 27.9 mmol) in dioxane (30 mL) was heated at 90° C. for 48 h. The reaction mixture was cooled to room temperature, added with water, and extracted with EtOAc. The organic layer was washed with brine, dried over anhydrous MgSO4, concentrated under reduced pressure, and purified by column chromatography on silica gel (EtOAc:hexanes=1:20 as eluant) to give 1-(4-(4-isopropoxyphenoxy)-2,6-dimethylphenyl)ethanone (16-4, 2.07 g) as white solids in 79% yield: 1H NMR (500 MHz, CDCl3) δ 6.94 (m, 2 H), 6.87 (m, 2 H), 6.58 (s, 2 H), 4.50 (t, J=6.1 Hz, 1 H), 2.46 (s, 3 H), 2.21 (s, 6 H), 1.34 (s, 6 H), 1.26 (m, 3 H), 0.87 (m, 3 H).

1. temperatureThe reaction mixture was cooled to room temperature
2. extractionextracted with EtOAc
3. washThe organic layer was washed with brine
4. dry with materialdried over anhydrous MgSO4
5. concentrationconcentrated under reduced pressure
6. custompurified by column chromatography on silica gel (EtOAc:hexanes=1:20 as eluant)