2,4,6-Trichlorophenol → Bis(2,4,6-trichlorophenyl) benzylpropanedioate

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A mixture of 2-benzylmalonic acid (10.0 g, 51.5 mmol), 2,4,6-trichlorophenol (20.3 g, 103 mmol), and POCl3 (12.0 mL, 129 mmol) was stirred under air at 105° C. for 2 hours. The reaction was then cooled to room temperature, poured on 150 mL ice, and extracted with 4:1 ether/DCM (3×150 mL). The combined organic layers were washed with water (1×400 mL) and 4 M aqueous NaCl (1×100 mL), and the yellow organic layer was dried (Na2SO4), filtered, and concentrated by rotary evaporation at <40° C. to provide the title compound as a tan thick oil that became a beige solid upon standing.

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