反应详情

To a solution of 10.77 g of 8-amino- 1,2,3,4-tetrahydroquinoline in glacial acetic acid (30 ml) was added dropwise a 21.75% solution of phosgene in chlorobenzene (30 ml), under nitrogen, with stirring. After the addition was complete, the mixture was heated under reflux, with stirring for one hr and evaporated. The residue was taken up in 10% ammonium hydroxide solution (75 ml) and extracted with dichloromethane. The organic extracts were dried over anhydrous magnesium sulfate, filtered, and the filtrate was evaporated. Ether was added to the residue and the mixture was chilled. The precipitate was collected to give 11.2 g (88%) of product.

1. additionAfter the addition
2. temperaturethe mixture was heated
3. temperatureunder reflux
4. stirringwith stirring for one hr
5. customevaporated
6. extractionextracted with dichloromethane
7. dry with materialThe organic extracts were dried over anhydrous magnesium sulfate
8. filtrationfiltered
9. customthe filtrate was evaporated
10. additionEther was added to the residue
11. temperaturethe mixture was chilled
12. customThe precipitate was collected