Hydrochloric Acid → 4,4'-Didocosyloxy-benzophenone

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To 4,4′-dihydroxy-benzophenone (8.2 g, 38.3 mmol) and 1-bromodocosane (31.3 g, 80.4 mmol) were added DMF (300 mL) and potassium carbonate (15.9 g, 115 mmol), and the mixture was stirred at 80° C. for 6.5 hr. After confirmation of the disappearance of the monoalkylated compound, the reaction mixture was ice-cooled, and 1N hydrochloric acid (300 mL) and water (150 mL) were slowly added to the thoroughly-stirred mixture. The slurry was filtered, and the obtained crystals were washed with water and methanol to give the title compound (28.3 g, 34.1 mmol, 89%).

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