2-(1,5-dimethyl-1H-indol-3-yl)-3-(5-methyl-1H-indol-3-yl)-N-methylmaleimide → 3-(1,5-dimethyl-1H-indol-3-yl)-4-(5-methyl-1H-indol-3-yl)-1-methyl-2,5-dioxopyrrolidine

Participants

Reaction Steps

To a solution of 2-(1,5-dimethyl-1H-indol-3-yl)-3-(5-methyl-1H-indol-3-yl)-N-methylmaleimide (100 mg, 0.26 mmol) in DMF (5 mL) was added a small amount of 10% palladium-carbon, and the whole was stirred at room temperature for 1 day under hydrogen atmosphere. The palladium-carbon was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography over silica gel (ethyl acetate:n-hexane =2:1) to obtain 3-(1,5-dimethyl-1H-indol-3-yl)-4-(5-methyl-1H-indol-3-yl)-1-methyl-2,5-dioxopyrrolidine (71 mg, 70.2%) as pale red solids.

Provenance & Evidence