1,1'-Carbonyldiimidazole → HCID 22611465, compound

Participants

Reaction Steps

To a solution of 43.5 mg (0.27 mMol) indole-5-carboxylic acid in 1.5 mL dimethylformamide were added 44.3 mg (0.27 mMol) carbonyldiimidazole resulting in immediate gas evolution. The reaction mixture was stirred for 4 hours at room temperature and then 60.0 mg (0.26 mMol) 6-amino-3-(dimethyl)amino-1,2,3,4-tetrahydro-9H-carbazole were added. After 3 days the reaction mixture was concentrated under reduced pressure. The residue was subjected to silica gel chromatography, eluting with 4:1 dichloromethane:2% ammonium hydroxide in methanol. Fractions shown to contain product were combined and concentrated under reduced pressure to give 66.7 mg (69%) of 6-(indol-5-oyl)amino-3-(dimethyl)amino-1,2,3,4-tetrahydro-9H-carbazole. The compound was converted to its corresponding hydrochloride salt, crystallizing from ethanol:diethyl ether.

Provenance & Evidence