Hydrochloric Acid → 1-{1-[(5-chloro-1H-indol-2-yl)carbonyl]piperidin-4-yl}-2-methylpropan-2-ol

Participants

Reaction Steps

To a solution of 370 mg of 5-chloroindole-2-carboxylic acid and 300 mg of 2-methyl-1-(piperidin-4-yl)-2-propanol in 8 mL of DMF were added 360 mg of 1-ethyl-3-(dimethylaminopropyl)carbodiimide hydrochloride and 250 mg of 1-hydroxybenzotriazole, followed by stirring at room temperature for 1 day. 0.5M aqueous hydrochloric acid was added to the reaction liquid, followed by extraction with ethyl acetate. The organic layer was washed with 0.5 M aqueous sodium hydroxide solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography [chloroform:methanol=1:0-10:1], and then crystallized from diisopropyl ether to obtain 268 mg of 1-{1-[(5-chloro-1H-indol-2-yl)carbonyl]piperidin-4-yl}-2-methylpropan-2-ol as a white crystal.

Provenance & Evidence