Hydrochloric Acid → 4-(4-Ethyl-5-fluoro-2-methoxyphenoxy)-3-fluorobenzoic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(4-ethyl-5-fluoro-2-methoxyphenoxy)-3-fluorobenzonitrile (420 mg, 1.45 mmol; which may be prepared as described in D1) in methanol (15 mL) was added an aqueous solution of 6N NaOH (7.3 mL, 43.6 mmol). The reaction mixture was heated to reflux (70° C.) and stirred overnight. After cooling with an ice bath, concentrated HCl (3.7 mL) was added slowly. The mixture was diluted with ethyl acetate and water. The aqueous layer was separated and extracted twice with ethyl acetate. The combined organic phases were dried over sodium sulfate, filtrated and concentrated in vacuo to give the title product as a beige solid (447 mg, quantitative).

Provenance & Evidence