Dimethylamine, hydrochloride → 1-(3-Dimethylamino-2-hydroxy-propyl)-1H-indole-3-carbaldehyde

Participants

Reaction Steps

A mixture of 1-(2,3-epoxypropyl)indole-3-carboxaldehyde (0.5 g, 2.5 mmol), N,N-dimethylamine hydrochloride (4 g, 49 mmol) and anhydrous potassium hydroxide (2.75 g, 49 mmol) was stirred in dry methanol (50 ml) at −30° C. for 8 h., then allowed to slowly warm to room temperature. The mixture was concentrated under reduced pressure to half the original volume, then water was added and the mixture was extracted with dichloromethane. After drying with anhydrous sodium sulfate the solvent was removed under reduced pressure, and the oily residue was chromatographed on a silica gel column (eluent dichloromethane:methanol from (9:1) to (8:2)) to yield the entitled product as a yellow oil 0.49 g (80%).

Provenance & Evidence