Hydrochloric Acid → 6-Bromo-1-[(4-methylphenyl)sulfonyl]-1H-indazole-4-carboxylic acid

Participants

Reaction Steps

Lithium hydroxide (0.774 g, 32.3 mmol) was added to a stirred suspension of methyl 6-bromo-1-[(4-methylphenyl)sulfonyl]-1H-indazole-4-carboxylate (5.51 g, 13.46 mmol) in tetrahydrofuran (50 ml) and water (15 ml) and the reaction mixture was stirred at RT for 1 h. The reaction mixture was poured onto 2N HCl (800 ml) with stirring. The precipitate formed was filtered off under vacuum and dried at 50° C. in a vacuum oven for 18 h to give the title compound as a yellow solid (3.5 g).

Provenance & Evidence