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In a dry 100 ml reaction bottle, dissolve 1.00 equivalent 4,4'-dimethoxytrimyl alcohol (2.66 g, 7.59 mmol) in 20 ml of benzene, reflux and stir the solution at 80 °C to dissolve, then add 5.00 equivalent acetyl chloride (5.96 g, 75.9 mmol) to the solution, stir the reaction for 10 minutes, and then add 5.00 equivalent Chemicalbook acetyl chloride to the reaction mixture after stirring for 10 minutes. Continue stirring the reaction mixture in the reflux state for 30 min until the TLC dot plate shows complete conversion of the starting material. After the end of the reaction, the reaction mixture is directly concentrated under reduced pressure to remove the solvent, and then pentane is added to the resulting residue, and then the crude product is obtained by filtering the precipitate, and finally the crude product is recrystallized and purified in pentane to obtain the target product molecule 4,4'-dimethoxytriphenylmethyl chloride
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