反应详情

3-[2-(2-Oxo-1,2-dihydroindol-3-ylidenemethyl)-4,5,6,7-tetrahydro-1H-indol-3-yl]-propionic acid (10 g) was dissolved in 100 mL of dimethylformamide. Carbonyldiimidazole (6.3 g) was added and the mixture stirred at ambient temperature for 1 hour. Ammonia (1 g) in 30 mL of dimethylformamide was added and the stirring continued overnight. Fifty mL of water was added to the mixture and stirring was continued for 10 minutes. The precipitate that formed was collected by vacuum filtration, washed with 20 mL of water and then 20 mL of ethanol. The solid was slurry-washed with 30 mL of refluxing ethanol for 5 minutes and cooled to room temperature. The solid was collected by vacuum filtration, washed with 20 mL of ethanol and vacuum dried to give 11 g (83% yield) of 3-[2-(2-oxo-1,2-dihydroindol-3-ylidenemethyl)-4,5,6,7-tetrahydro-1H-indol-3-yl]-propionamide.

1. customthe stirring continued overnight
2. stirringstirring
3. waitwas continued for 10 minutes
4. customThe precipitate that formed
5. filtrationwas collected by vacuum filtration
6. washwashed with 20 mL of water
7. washThe solid was slurry-washed with 30 mL of refluxing ethanol for 5 minutes
8. temperaturecooled to room temperature
9. filtrationThe solid was collected by vacuum filtration
10. washwashed with 20 mL of ethanol and vacuum
11. customdried