2,3-Dichlorobenzene-1-sulfonyl chloride → 3-(2,3-Dichlorophenylsulfonyloxy)-5-methylphenol

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A solution of orcinol monohydrate (0.71 g, 5.0 mmol) and 2,3-dichlorobenzenesulfonyl chloride (1.23 g, 5.0 mmol) in saturated NaHCO3 (20 mL) and diethyl ether (20 mL was stirred at room temperature for 2 days. The reaction mixture was quenched with water (50 mL) and extracted with ethyl acetate (3×50 mL). The organic phase was washed with brine (2×50 mL) and dried over Na2SO4. The solvent was evaporated in vacuo and the residue was purified by flash column chromatography (methylene chloride to 2% ethyl acetate in methylene chloride) to give the title compound as a pale yellow oil (0.89 g, 55%). 1H-NMR (300 MHz, CDCl3) δ 2.24 (s, 3 H), 5.23 (s, 1 H), 6.43 (t, 1 H, J=2.2 Hz), 6.54 (d, 2 H, J=1.1 Hz), 7.34 (t, 1 H, J=8.1 Hz), 7.75 (dd, 1 H, J=0.8, 4.0 Hz), and 7.91 (dd, 1 H, J=0.8, 4.0 Hz).

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