反应详情

温度

85 °C

To a stirred degassed solution of 4-bromobenzaldehyde (218 mg, 1.18 mmol) and 2-methoxybenzeneboronic acid (188 mg, 1.24 mmol) in DME/THF (5 mL, 4:1) were added a 2 M Na2CO3 solution (1.6 mL) and Pd(PPh3)4 (63 mg, 0.055 mmol). The reaction mixture was flushed with argon and maintained under argon while being heated at 85° C. overnight. The mixture was then cooled and diluted with EtOAc (25 mL) and water (25 mL). The aqueous layer was washed with EtOAc (2×10 mL) and the combined organic extracts dried (Na2SO4), filtered and concentrated. Purification of the resultant oil by column chromatography with silica gel (Hexanes/Et2O, 80:20) afforded the title compound (230 mg, 92%) as a clear oil. 1H NMR (CDCl3) δ3.84 (s, 3H), 7.01-7.09 (m, 2H), 7.33-7.39 (m, 2H), 7.71 (d, 2H, J=6 Hz), 7.93 (d, 2H, J=6 Hz), 10.05 (s, 1H).

1. customThe reaction mixture was flushed with argon
2. temperaturemaintained under argon
3. temperatureThe mixture was then cooled
4. additiondiluted with EtOAc (25 mL) and water (25 mL)
5. washThe aqueous layer was washed with EtOAc (2×10 mL)
6. dry with materialthe combined organic extracts dried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customPurification of the resultant oil by column chromatography with silica gel (Hexanes/Et2O, 80:20)