Piperidine → 5-(2-Dimethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidenemethyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one

Participants

Reaction Steps

A stirred solution of 5-(2-dimethylamino-ethyl)-3-methyl-4-oxo-4,5,6,7-tetrahydro-1H-pyrrolo[3,2-c]pyridine-2-carbaldehyde (67 mg, 0.267 mmol), 5-fluoro-1,3-dihydro-indol-2-one (40 mg, 0.267 mmol) in 0.66 ml of ethanol was added dropwise with anhydrous piperidine (0.1 ml). The mixture was stirred at room temperature overnight. The resulting solid was filtered under reduced pressure, washed with ethanol (1 ml×3) and purified by silica gel column chromatography with triethylamine:methanol:dichloromethane (1:20:500) as eluents to give 5-(2-dimethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidenemethyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one (60 mg, 54.8%) as a yellow solid.

Provenance & Evidence