反应详情

温度

80 °C

Methyl iodide (227 mg, 0.1 mL, 1.68 mmol) was added drop wise to a suspension of 4-(Methyl-phenyl-amino)-benzoic acid (120 mg, 0.56 mmol) and K2CO3 in DMF (5 mL). The resulting mixture was heated at 80° C. with stirring overnight. The mixture was filtered, cold water was then added, and the product was extracted with EtOAc. The organic layer was washed with saturated brine solution and dried over Na2SO4. The organic layer was then concentrated under reduced pressure to get the residue The obtained residue was purified by column chromatography (using silica gel of 60-120 mesh and 5% EtOAc in Hexane as eluent) to afford 85 mg (75% yield) of 4-(Methyl-phenyl-amino)-benzoic acid methyl ester. 1H-NMR (CDCl3): δ 7.8 (d, 2H), 7.4 (T, 2H), 7.2 (m, 2H), 6.8 (d, 2H), 3.8 (s, 3H), 3.2 (s, 3H).

1. filtrationThe mixture was filtered
2. additioncold water was then added
3. extractionthe product was extracted with EtOAc
4. washThe organic layer was washed with saturated brine solution
5. dry with materialdried over Na2SO4
6. concentrationThe organic layer was then concentrated under reduced pressure
7. customto get the residue The obtained residue
8. customwas purified by column chromatography (using silica gel of 60-120 mesh and 5% EtOAc in Hexane as eluent)