反应详情

4-Fluoro-2-(4-methoxybutylamino)aniline (4.28 g) was dissolved in acetic acid (100 ml), methyl 2,2,2-trichloroethanimidate (2.49 ml) was added dropwise, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, and the residue was azeotroped with toluene. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate was concentrated under reduced pressure to give the object product (6.53 g).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customthe residue was azeotroped with toluene
3. washa fraction eluted with ethyl acetate
4. concentrationwas concentrated under reduced pressure