[C:1]([N:4]1[CH2:10][CH2:9][CH2:8][C:7]2[CH:11]=[CH:12][S:13][C:6]=2[CH2:5]1)(=[O:3])[CH3:2].[Cl:14][CH2:15][C:16](Cl)=[O:17].[Cl-].[Al+3].[Cl-].[Cl-].O>ClCCl>[C:1]([N:4]1[CH2:10][CH2:9][CH2:8][C:7]2[CH:11]=[C:12]([C:16](=[O:17])[CH2:15][Cl:14])[S:13][C:6]=2[CH2:5]1)(=[O:3])[CH3:2]To a solution of 2 g of 7-acetyl-5,6,7,8-tetrahydro-4H-thieno[2,3-c]azepine and 1.7 g of chloroacetyl chloride in 25 ml of dichloromethane was added 4.8 g of aluminum chloride under ice-cooling. The mixture was stirred for 30 minutes and refluxed under heating for an hour. The mixture was poured into water and extracted with chloroform. The extract was washed with water, dried over magnesium sulfate and concentrated to give 2.2 g of 7-acetyl-2-chloroacetyl-5,6,7,8-tetrahydro-4H-thieno[2,3-c]azepine as an oil.
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