A solution of acetyl chloride (28.28 mmol) was added dropwise to a mixture of triphenylamine (4.1 mmol) and AlCl3 (13.5 mmol) in 150 mL of dry CH2Cl2. The reaction was then refluxed and stirred for 12 h. The reaction was diluted using H2O (100 mL). The aqueous layer was extracted using CH2Cl2 (3×150 mL). The CH2Cl2 layers were dried using anhydrous Na2SO4. The solution was concentrated under reduced pressure before the purification via flash column chromatography using silica gel (pentane/CH2Cl2, 1:10).