反应详情

A mixture of 4-(2,2,3,3-tetrafluoropropoxy)aniline (7.4 g), N-(2-bromoethyl)phthalimide (9.0 g), potassium bicarbonate (6.9 g), potassium iodide (5.5 g) and N,N-dimethylformamide (80 ml) are refluxed for 22 hours. The solvent was distilled off under reduced pressure. To the residue, ice-water (200 ml) and ethyl acetate (200 ml) were added and fractionated. The ethyl acetate layer was washed with water, dried over anhydrous magnesium sulfate and distilled off under reduced pressure. The residue was purified by silica gel chromatography (eluate; ethyl acetate:hexane=1:2 v/v) and recrystallized from ethyl acetate-diisopropyl ether to give N-(2-phthalimido)ethyl-4-(2,2,3,3-tetrafluoropropoxy)aniline (5.4 g) as white crystals.

1. temperatureare refluxed for 22 hours
2. distillationThe solvent was distilled off under reduced pressure
3. additionTo the residue, ice-water (200 ml) and ethyl acetate (200 ml) were added
4. washThe ethyl acetate layer was washed with water
5. dry with materialdried over anhydrous magnesium sulfate
6. distillationdistilled off under reduced pressure
7. customThe residue was purified by silica gel chromatography (eluate; ethyl acetate:hexane=1:2 v/v)
8. customrecrystallized from ethyl acetate-diisopropyl ether