Lithium iodide → 2,6-Dichloro-4-(hydroxymethyl)benzoic acid

関与物質

反応手順

A suspension of methyl 2,6-dichloro-4-(hydroxymethyl)benzoate (5.3 g, 22 mmol) in pyridine (20 mL) was treated with anhydrous lithium iodide (9 g, 67 mmol). The resulting reaction mixture was heated to reflux for 5 hours, cooled to room temperature and concentrated under vacuum. The residue was diluted with water and acidified with dilute hydrochloric acid (pH 2-3) and partitioned with ethyl acetate. The combined organic layer was washed with brine, dried over sodium sulfate, concentrated and the residue obtained upon triturating with diethyl ether afforded 2,6-dichloro-4-(hydroxymethyl)benzoic acid as a pale yellow solid (3.5 g, 70%).

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