反应详情

温度

50 °C

To a cold solution of 180 g of 3-isopropyl-3-methyl-5H-imidazo[2,1-a] isoindole-2-(3H), 5-dione in 300 ml of dry tetrahydrofuran in a pressure bottle is added 68 g of dimethylamine. The bottle is sealed and the mixture heated to 50° C. with stirring for 16 hours. The mixture is cooled, and the contents of the bottle transferred to a flask. The solvent is then removed in vacuo. The crystalline residue is then suspended in ether, filtered, washed with ether, and air-dried to give 195 g of o-(5-isopropyl-5-methyl-4-oxo-2-imidazolin-2-yl)-N,N-dimethylbenzamide, melting point 144°-146° C. This product is recrystallized from acetonitrile to give an analytically pure product, melting point 147°-150° C.

1. customThe bottle is sealed
2. temperatureThe mixture is cooled
3. customthe contents of the bottle transferred to a flask
4. customThe solvent is then removed in vacuo
5. filtrationfiltered
6. washwashed with ether
7. customair-dried