[CH2:1]([O:3][C:4]1[CH:9]=[CH:8][C:7]([CH3:10])=[CH:6][C:5]=1[O:11][CH2:12][CH2:13][CH2:14][O:15][CH3:16])[CH3:2].[Br:17]N1C(=O)CCC1=O.N(C(C)(C)C#N)=NC(C)(C)C#N>C(Cl)(Cl)(Cl)Cl>[Br:17][CH2:10][C:7]1[CH:8]=[CH:9][C:4]([O:3][CH2:1][CH3:2])=[C:5]([O:11][CH2:12][CH2:13][CH2:14][O:15][CH3:16])[CH:6]=1The mixture of 2.01 g of 1-ethoxy-2-(3-methoxypropoxy)-4-methylbenzene, 1.76 g of N-bromosuccinimide and 0.150 g of 2,2′-azobis(2-methylpropionitrile) in 90 ml of carbon tetrachloride is kept at reflux with stirring over 1 hour. The reaction mixture is cooled and clarified by filtration, and the filtrate is concentrated by evaporation. The title compound is obtained as a beige solid from the residue by means of flash chromatography (SiO2 60F).
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