Hydrochloric Acid → 1-(3,4-Difluorophenyl)-indole-5-carboxylic acid

Participants

Reaction Steps

A mixture of methyl 1-(3,4-difluorophenyl)-indole-5-carboxylate 24c (3.0 g, 10.4 mmol) and LiOH (1.0 g, 41.8 mmol) in THF (120 mL) and H2O (60 mL) was stirred at room temperature for 5 days. Aqueous 10% HCl solution was added to the reaction mixture to adjust pH=3˜4. The resulting mixture was extracted with EtOAc (2×). The organic solution was washed with aq. NaCl, dried over Na2SO4 and concentrated to give 24d (2.85 g).

Provenance & Evidence