[Br:1][C:2]1[CH:9]=[CH:8][C:5]([NH:6][CH3:7])=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:17][CH2:18][OH:19]>CN(C=O)C>[Br:1][C:2]1[CH:9]=[CH:8][C:5]([N:6]([CH3:7])[CH2:17][CH2:18][OH:19])=[CH:4][CH:3]=14-bromo-N-methylaniline (700 mg, 3.76 mmol) was dissolved in DMF (20 mL), K2CO3 (1.56 g, 11.29 mmol) and 2-bromoethanol (1.41 g, 11.29 mmol) were added in. The mixture was reacted at 100° C. for 2 days. Then it was extracted by EA and brine, washed by brine, dried over Na2SO4, concentrated and purified by flash chromatography, (PE: EA=10:1 to 3:1) to give 164 mg brown oil.
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