Sodium Hydroxide → 5-(3-butyl-5-hydroxymethyl-isoxazol-4-ylmethoxy)-2-methyl-2H-pyrazole-3-carboxylic acid

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Reaction Conditions

Reaction Steps

To a solution of 5-(3-butyl-5-hydroxymethyl-isoxazol-4-ylmethoxy)-2-methyl-2H-pyrazole-3-carboxylic acid methyl ester (260 mg, 0.81 mmol) in dioxane (15 mL) was added aqueous sodium hydroxide (2 M, 7.0 mL, 7.0 mmol). After heating at 90° C. for 1.5 h the solution was cooled to room temperature, diluted with water, extracted with ethyl acetate and the combined organic phases were washed with brine, dried over sodium sulfate, filtered and concentrated to afford the title compound (250 mg, 100%) as a white solid. MS: m/e=308.5 [M−H]−.

Provenance & Evidence