反应详情

Twenty-five grams (g) (0.142 mole) 4-amino-N-methylphthalimide [Flitsch, Chem. Ber. 94:2494(1961)] and 20.7 g (0.21 mole) 1-chloro-2,3-epoxypropane were added to 150 ml 2,2,2-trifluoroethanol and the reaction mixture was heated to reflux with stirring for 48 hours. Seventy to eighty ml of 2,2,2-trifluoroethanol was removed by distillation and a heavy yellow precipitate formed when the remaining solution cooled to room temperature. This precipitate was triturated with ethyl acetate, collected by filtration and dried to give 29.5 g (77% yield) of the desired phthalimide intermediate m.p. 136°-138.5° C.

1. temperaturethe reaction mixture was heated
2. temperatureto reflux
3. customSeventy to eighty ml of 2,2,2-trifluoroethanol was removed by distillation
4. customa heavy yellow precipitate formed when the remaining solution
5. customThis precipitate was triturated with ethyl acetate
6. filtrationcollected by filtration
7. customdried