反应详情

N-chlorosuccinimide (2.52 g, 18.9 mmol) was added to a solution of 4-[2-(dipropylamino)ethyl]indole (IV) (3 g, 12.28 mmol) in toluene (10 mL) and was stirred at room temperature for 1 h. The resultant mixture was washed with an aqueous solution of NaOH 5% and then an aqueous solution of HCl 1N (30 mL) was added to the organic layer and was heated at reflux temperature for 1 h. When the mixture reached room temperature, the organic layer was separated and the aqueous layer was basified with an aqueous solution of NaOH and extracted with AcOEt. The organic layer was dried, filtered and concentrated to obtain 2.1 g (66%) of 4-[2-(dipropylamino)ethyl]indol-2-one (I), which was purified and converted into its hydrochloride salt.

1. washThe resultant mixture was washed with an aqueous solution of NaOH 5%
2. additionan aqueous solution of HCl 1N (30 mL) was added to the organic layer
3. temperaturewas heated
4. temperatureat reflux temperature for 1 h
5. customreached room temperature
6. customthe organic layer was separated
7. extractionextracted with AcOEt
8. customThe organic layer was dried
9. filtrationfiltered
10. concentrationconcentrated