反应详情

温度

50 °C

A solution of 32.0 g of 1-(4-bromopyridin-2-yl)-4-methoxybutylamine in 150 ml of glacial acetic acid is mixed with 37 ml of acetic anhydride. The reaction solution is stirred at 50° C. for 30 minutes and then diluted with ethyl acetate. It is basified with 2M sodium hydroxide solution, and the phases are separated. The aqueous phase is extracted with ethyl acetate (2×). The combined organic phases are evaporated. The title compound is obtained as a yellowish solid from the residue by flash chromatography (SiO2 60 F). Rf=0.38 (EtOAc-methanol 9:1); Rt=2.33 (Gradient I).

1. customthe phases are separated
2. extractionThe aqueous phase is extracted with ethyl acetate (2×)
3. customThe combined organic phases are evaporated