Hydrochloric Acid → 6-(3-Butyl-5-methyl-isoxazol-4-ylmethoxy)-pyridazine-3-carboxylic acid

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Reaction Steps

To a solution of 6-(3-butyl-5-methyl-isoxazol-4-ylmethoxy)-pyridazine-3-carboxylic acid ethyl ester (960 mg, 3.0 mmol) in THF (10 mL) was added a solution of lithium hydroxide monohydrate (252 mg, 6.0 mmol) in water (10 mL) and the resulting mixture stirred at room temperature for 30 min. The mixture was acidified to pH 1 with HCl (1 N) and the resulting mixture extracted with ethyl acetate. The combined organic layers were then washed with water and brine, dried over sodium sulfate and evaporated to afford the title compound (850 mg, 87%) which was obtained as a red gum. MS: m/e=290.1 [M−H]−.

Provenance & Evidence