反应详情

Thionyl chloride (2.4 ml, 33 mmol) was added dropwise to a stirred solution of 3-(4-chlorobenzoyl)propionic acid (5.0 g, 24 mmol) in dry methanol (50 ml) at 0° C. The mixture was heated at reflux for 2 h, cooled and the solvent removed under reduced pressure to give methyl 3-(4-chlorobenzoyl)propionate (5.3 g, 97%) as a colourless oil. deltaH (250 MHz, CDCl3) 7.93 (2H, d, J 8.5 Hz), 7.45 (2H, d, J 8.6 Hz), 3.72 (3H, s), 3.29 (2H, t, J 6.6 Hz), 2.78 (2H, t, J 6.6 Hz).

1. temperatureThe mixture was heated
2. temperatureat reflux for 2 h
3. temperaturecooled
4. customthe solvent removed under reduced pressure