[Br:1][CH:2](Br)[CH3:3].[Cl:5][C:6]1[CH:11]=[C:10]([N+:12]([O-:14])=[O:13])[CH:9]=[CH:8][C:7]=1[OH:15]>C(=O)([O-])[O-].[K+].[K+].O>[Cl:5][C:6]1[CH:11]=[C:10]([N+:12]([O-:14])=[O:13])[CH:9]=[CH:8][C:7]=1[O:15][CH2:3][CH2:2][Br:1]Dibromoethane (14.9 ml, 0.1728 mol) and 2-chloro-4-nitrophenol (10 g, 0.0576 mol) were dissolved in dimethylfomamide (250 ml) and potassium carbonate (9.55 g) was added to the resulting solution, followed by stirring at 85° C. for 30 min. Thereafter, the reaction solution was diluted with water and subjected to three extractions with ethyl acetate. The organic extracts were combined, dried with magnesium and the solvent was evaporated; thereafter, the residue was purified by being subjected to column chromatography using a 1:1 solvent system of n-hexane and ethyl acetate as an eluent and the fractions containing the end product were collected and subjected to evaporation to yield the end compound 1-(2-chloro-4-nitrophenoxy)-2-bromoethane (14.0 g) as a yellow solid mass.
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