Hydrochloric Acid → 5-Bromo-1H-indole-7-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

409 mg of 5-bromo-1H-indole-7-carboxylic acid methyl ester (1.61 mmol) were suspended in a mixture of 1.6 ml 2N NaOH and 1.6 ml ethanol and stirred at 40° C. for 2 h. After cooling down, the mixture was treated with 2N aqueous HCl, and extracted twice with EtOAc. The organic phase was the washed with brine, dried over magnesium sulfate, filtered and concentrated in vacuo, leading to 353 mg of 5-bromo-1H-indole-7-carboxylic acid as a light brown solid (85%). MS (ISP) 237.9 (M−H)−.

Provenance & Evidence