Hydrochloric Acid → 3-(2-Fluoro-phenyl)-5-methyl-isoxazole-4-carboxylic acid

Participants

Reaction Steps

A solution of 4-methoxycarbonyl-5-methyl-3-(2-fluorophenyl)isoxazole (2.20 g, 8.84 mmol), MeOH (25 ml), and 2N NaOH (8.8 ml) was heated at 50° C. overnight (19 h). The reaction was cooled to room temperature, diluted with H2O, and acidified (2N HCl) to less than pH 3. The mixture was extracted with EtOAc (twice) and the combined extracts were washed (brine), dried (MgSO4), filtered, and concentrated to give the title compound (1.88 g, 96%). This material was used without further purification.

Provenance & Evidence