Benzoyl Peroxide → 5-Bromo-2-bromomethyl-6-oxo-1-phenyl-1,6-dihydro-pyridine-3-carboxylic acid methyl ester

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A mixture of 5-bromo-2-methyl-6-oxo-1-phenyl-1,6-dihydro-pyridine-3-carboxylic acid methyl ester (2.51 g, 7.8 mmol), N-bromosuccinimide (1.53 g, 8.6 mmol), and benzoyl peroxide (189 mg, 0.78 mmol) in CCl4 (60 mL) was refluxed for 16 h. After cooling to r.t., the solvent was evaporated in vacuo, and the residue was chromatographed (0-20% EtOAc/hexanes) to give 2.82 g of the title compound. MS: (+) m/z 402.06 (M+1)

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