[C:1]([C:5]1[CH:11]=[CH:10][CH:9]=[CH:8][C:6]=1[NH2:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.[C:19](Cl)(=[O:21])[CH3:20]>C1COCC1>[C:1]([C:5]1[CH:11]=[CH:10][CH:9]=[CH:8][C:6]=1[NH:7][C:19](=[O:21])[CH3:20])([CH3:4])([CH3:2])[CH3:3]To a solution of 2-tert-butylaniline (5.0 g, 33.5 mmol) and triethylamine (11.2 g, 110.6 mmol) in THF (350 mL) was added acetyl chloride (2.89 g, 36.9 mmol). After being stirred at room temperature for 3 h, the reaction mixture was partitioned between ethyl acetate and water. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting white solid was triturated with hexane/ethyl acetate to give the title compound (6.13 g) as a white crystalline powder.
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