反应详情

温度

100 °C

A mixture of 1-(4-hydroxy-2,6-dimethylphenyl)ethanone (4-2, 4.66 g, 28.4 mmol), 2-chloropyrazine (2.50 g, 21.8 mmol), copper (27.7 mg, 4.36 mmol), and potassium carbonate (9.05 g, 65.5 mmol) in 43.7 mL of DMF was stirred at 100° C. overnight. The reaction mixture was added with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous MgSO4(s), concentrated under reduced pressure, and purified by column chromatography on silica gel (50% EtOAc in hexanes as eluant) to give 1-(2,6-dimethyl-4-(pyrazin-2-yloxy)phenyl)ethanone (7-1, 4.65 g) as brown oils: 1H NMR (500 MHz, CDCl3) δ 8.43 (bs, 1 H), 8.29 (bs, 1 H), 8.14 (bs, 1 H), 6.83 (s, 2 H), 2.49 (s, 3 H), 2.27 (s, 6 H).

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with brine
3. dry with materialdried over anhydrous MgSO4(s)
4. concentrationconcentrated under reduced pressure
5. custompurified by column chromatography on silica gel (50% EtOAc in hexanes as eluant)