Cl[C:2]1[CH:7]=[CH:6][C:5]([CH2:8][CH2:9][CH2:10][CH3:11])=[CH:4][CH:3]=1.[Cl-].[Al+3].[Cl-].[Cl-].C(Cl)(=[O:18])C.Cl.[Cl:21][CH2:22][CH2:23]Cl>O>[Cl:21][CH2:22][CH2:23][CH2:11][CH2:10][CH2:9][C:8]([C:5]1[CH:6]=[CH:7][CH:2]=[CH:3][CH:4]=1)=[O:18]To a 250 ml round-bottomed flask were added 5.0 g (29.65 mmol) 4-chlorophenylbutane and 10 ml 1,2-dichloroethane. To the stirred solution was added a solution of 4.35 g (32.62 mmol) aluminum chloride and 4.22 ml (59.31 mmol) acetyl chloride in 50 ml 1,2-dichloroethane. The solution evolved HCl as it was stirred at room temperature for 1 hour. It was then poured into water, the layers were separated, and the organic layer was washed with 1N HCl, aqueous sodium bicarbonate solution, and brine, dried over sodium sulfate, and evaporated to an oil, 6.7 g (>100%). NMR (CDCl3): 1.76 (m, 4H), 2.54 (m, 3H), 2.66 (m, 2H), 3.50 (m, 2H), 7.2 and 7.85 (m, 4H). IR (cm.-1, neat): 1678 (C=O).
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