反应详情

A dispersion of 60% NaH (6.85 g, 0.17 mol) was added to an ice-cooled solution of 5-chloroindole (20 g, 0.13 mol) in 250 ml of dry DMF. The stirring was continued for 20 minutes at room temperature, and the mixture was cooled again with an ice bath. After portionwise addition of solid 2-bromopropanamide (24.1 g, 0.15 mol), the reaction mixture was stirred for 1 h 30 at room temperature, then poured into cold water and extracted 3 times with AcOEt. The combined organic phases were dried over Na2SO4, filtered and concentrated in vacuo. The crude material was purified by silica gel chromatography (AcOEt/hexane 50/50) to give pure 2-(5-chloro-1H-indol-1-yl)propanamide 25 as a white solid.

1. temperaturethe mixture was cooled again with an ice bath
2. extractionextracted 3 times with AcOEt
3. dry with materialThe combined organic phases were dried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe crude material was purified by silica gel chromatography (AcOEt/hexane 50/50)