反应详情

5-Chloro-3-formyl-7-nitro-2-phenyl-1H-indole (0.5 g, 1.66 mmol) obtained in Step 1 was dissolved in dichloromethane (20 mL), and thereto acetic acid (0.10 g, 1.66 mmol), 2-oxopiperazine (0.3 g, 3.32 mmol) and sodium triacetoxy borohydride (0.71 g, 3.32 mmol) were added in drops. The mixture was stirred at room temperature for 4 hours. At the end of reaction, the mixture was diluted with water, and extracted with dichloromethane. The extract was washed with saturated sodium chloride solution, dried over anhydrous magnesium sulfate and filtered. The solvent was removed under reduced pressure and the residue was separated by column chromatography to give 5-chloro-7-nitro-3-(2-oxo-piperazin-4-yl)methyl-2-phenyl-1H-indole (0.55 g, Yield 86%).

1. customAt the end of reaction
2. extractionextracted with dichloromethane
3. washThe extract was washed with saturated sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. customThe solvent was removed under reduced pressure
7. customthe residue was separated by column chromatography