Carbon Tetrachloride → 2-(7-Bromo-3-chloromethyl-naphthalen-1-yloxy)-5-ethanesulfonyl-pyridine

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Reaction Steps

After a solution of triphenylphosphine (330 mg, 1.26 mmol) and carbon tetrachloride (2 mL) in anhydrous tetrahydrofuran (6 mL) was stirred at room temperature for 10 minutes under a nitrogen atmosphere, [6-bromo-4-(5-ethanesulfonyl-pyridin-2-yloxy)-naphthalen-2-yl]-methanol (265 mg, 0.63 mmol) was introduced as a solid. The resulting mixture was heated at reflux for 4 hours, cooled to room temperature, then diluted with water (10 mL), and extracted with ethyl acetate (30 mL×2). The combined organic layers were dried over sodium sulfate and concentrated in vacuo. The residue was purified by silica gel chromatography (silica gel, 100-200 mesh, 5% ethyl acetate in petroleum ether) to afford 2-(7-bromo-3-chloromethyl-naphthalen-1-yloxy)-5-ethanesulfonyl-pyridine (210 mg, 76%) as a yellow oil.

Provenance & Evidence