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yhc0316

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9,10-Bis(chloromethyl)anthracene. To a stirred mixture of anthracene (1.78 g, 10 mmol), anhydrous ZnCl2 (1.64 g, 12 mmol), and paraformaldehyde (1.50 g, 50 mmol) in dioxane (20 mL) was slowly added concentrated aqueous hydrochloric acid (40 mL) at room temperature. The mixture was gentle refluxed for 3 h and allowed to stand for 16 h at room temperature. The resulting  fine granular solid was separated by  filtration and washed with H2O and dioxane to afford the crude product. The crude product was recrystallized from toluene to give a yellowish solid (1.81 g, 64.1%). 1H NMR (500 MHz, CDCl3): d 8.40 (m, 4H), 7.62 (m, 4H), 5.61 ppm (s, 4H).
  9,10-Bis(diethoxylphosphorylmethyl)anthracene. A mixture of 9,10-bis(chloromethyl)anthracene (7.80 g, 28.3 mmol) and triethyl phosphite (50 mL) was stirred and gently refluxed overnight. The excess triethyl phosphite was removed by distillation under reduced pressure. The crude product was separated by silica gel column chromatography using ethyl acetate/petroleum ether (1/1, v/v) as the eluent. A yellow solid was obtained (10.4 g, 76.8%). 1H NMR (500 MHz, CDCl3): d 8.32 (d, 4H), 7.53 (d, 4H), 4.21 (q, 8H), 3.78 (d, 4H), 1.11 ppm (t, 12H).

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