Potassium Carbonate → (4,5-Dichloro-1H-indol-3-yl)acetic acid

Participants

Reaction Steps

An aqueous solution prepared by dissolving 120 mg of potassium carbonate in 2.5 ml of water was added to a solution of 44 mg of methyl 4,5-dichloroindole-3-acetate in 5 ml of methanol. The mixture was refluxed for 1.5 hours, after which the methanol was removed by distillation under reduced pressure, and the aqueous solution thus obtained was extracted with ethyl acetate. The aqueous phase was acidified with 1N hydrochloric acid and extracted with ethyl acetate. The ethyl acetate phase was washed with distilled water and a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate, and the solvent was removed by distillation under reduced pressure to obtain a crude product. The crude product was purified by a silica gel thin-layer chromatography to obtain 30 mg of 4,5-dichloroindole-3-acetic acid.

Provenance & Evidence