6-CHLORO-1H-INDOLE-2-CARBALDEHYDE

53590-58-2

53590-59-3

GENERAL STEPS: A suspension of 2-hydroxymethyl-6-chloroindole (1 mmol) with activated MnO2 (10 mmol) in DMF (30 mL) was stirred at room temperature for 12 hours. After completion of the reaction, the mixture was filtered through a diatomaceous earth pad. The filtrate was concentrated under vacuum and the residue was purified by column chromatography to afford 6-chloro-1H-indole-2-carbaldehyde using EtOAc-hexane mixed solvent as eluent.