Br[CH2:2][C:3]1[CH:8]=[CH:7][C:6]([I:9])=[CH:5][C:4]=1[Cl:10].[C:11]1(=[O:21])[NH:15][C:14](=[O:16])[C:13]2=[CH:17][CH:18]=[CH:19][CH:20]=[C:12]12.[K]>CN(C)C=O.C(OCC)(=O)C>[Cl:10][C:4]1[CH:5]=[C:6]([I:9])[CH:7]=[CH:8][C:3]=1[CH2:2][N:15]1[C:14](=[O:16])[C:13]2=[CH:17][CH:18]=[CH:19][CH:20]=[C:12]2[C:11]1=[O:21]In a solution of 7.6 g of 1-bromomethyl-2-chloro-4-iodobenzene in 50 mL of N,N-dimethylformamide, 3.7 g of potassium phthalimide was added, and stirred at room temperature for 1 hour. After the completion of the reaction, the reaction mixture was diluted with 80 mL of ethyl acetate, washed with water (30 mL×2), and then dehydrated with and dried over saturated sodium chloride aqueous solution and anhydrous sodium sulfate in that order, and the solvent was distilled off under reduced pressure to obtain 5.7 g of the aimed product as white crystal.
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