Azobisisobutyronitrile → 4-(Bromomethyl)-1-chloro-2-methoxybenzene

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To a solution of 1-chloro-2-methoxy-4-methyl-benzene (50 g, 0.32 mol) in CCl4 (350 mL) was added NBS (57.2 g, 0.32 mol) and AIBN (10 g, 60 mmol). The mixture was heated at reflux for 3 hours. The solvent was evaporated under vacuum and the residue was purified by column chromatography on silica gel (Petroleum Ether/EtOAc=20:1) to give 4-bromomethyl-1-chloro-2-methoxy-benzene (69 g, 92%). 1H NMR (400 MHz, CDCl3) δ 7.33-7.31 (m, 1H), 6.95-6.91 (m, 2H), 4.46 (s, 2H), 3.92 (s, 3H).

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