反应详情

Acetyl chloride (6.42 g, 81.7 mmol) was added dropwise to a stirred solution of bis-dimethylamino-methane (BDAM) (8.34 g, 81.7 mmol) in dry dichloromethane (100 ml), while cooling in an ice bath. After 5 minutes, a solution of 4-chloro-5-benzyloxyindole (15.6 g, 60.7 mmol) in dichloromethane (100 ml) was added, dropwise, followed by addition of 10% aqueous sodium hydroxide (300 ml) after a further 10 minutes. The mixture was extracted with dichloromethane, and the extracts dried (Na2SO4) and stripped to a crude solid which was purified by chromatography (SiO2 ; CHCl3 /MeOH/NH4OH) and recrystallised from ethanol to give 3- dimethylaminomethyl-4-chloro-5-benzyloxyindole (9.66 g), m.p. 137°-9° C.

1. temperaturewhile cooling in an ice bath
2. extractionThe mixture was extracted with dichloromethane
3. dry with materialthe extracts dried (Na2SO4)
4. customwas purified by chromatography (SiO2 ; CHCl3 /MeOH/NH4OH)
5. customrecrystallised from ethanol