[O:1]1[CH:5]=[CH:4][C:3]([CH2:6][NH:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[CH:2]1.Br[CH2:21][CH2:22][OH:23].C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[O:1]1[CH:5]=[CH:4][C:3]([CH2:6][N:7]([CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH2:21][CH2:22][OH:23])=[CH:2]1To a solution of 2.538 g (9.861 mmol) of N-(3-furylmethyl)-6-phenylhexylamine and 7.39 g (59.2 mmol) of 2-bromoethanol in 50 ml of N,N-dimethylformamide, 13.6 g (98.6 mmol) of potassium carbonate was added, followed by overnight stirring at 90° C. After cooling to room temperature, the reaction mixture was poured into water and extracted with dichloromethane 3 times. The combined organic layer was dried over anhydrous magnesium sulfate; the solvent was distilled off under reduced pressure. The resulting crude product was purified by silica gel column chromatography (hexane/ethyl acetate=3/1 to 1/1) to yield the desired product.
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