反应详情

A mixture of 1-benzyl-3-methyl-6-oxo-1,6-dihydro-pyridine-2-carboxylic acid ethyl ester (158 mg, 0.58 mmol), N-bromosuccinimide (114 mg, 0.64 mmol) and benzoyl peroxide (14 mg, 0.058 mmol) in CCl4 (6 mL) was refluxed for 16 h. After cooling to r.t., solvent was evaporated in vacuo. The residue was chromatographed (0-35% EtOAc/hexanes) to give 147 mg of the title compound. 1H NMR (CDCl3, 200 MHz): δ=7.10-7.40 (m, 6H), 6.72 (d, 1H, J=9.2 Hz), 5.32 (s, 2H), 4.24, (s, 2H), 4.19 (q, 2H, J=7.0 Hz), 1.16 (t, 3H, J=7.0 Hz).

1. temperaturewas refluxed for 16 h
2. customsolvent was evaporated in vacuo
3. customThe residue was chromatographed (0-35% EtOAc/hexanes)