反应详情

A solution of bromine (1.56 g) in acetic acid (5 ml) was added dropwise to a solution of 2-acetyl-6-(acetylaminomethyl)pyridine (1.87 g) and 30 weight % hydrogen bromide-acetic acid solution (4.2 ml) in a mixture of acetic acid (40 ml) and methanol (10 ml) at ambient temperature with stirring. The mixture was warmed to 60° to 70° C. and stirred for two hours. The solvent was evaporated in vacuo and the residue was triturated with diisopropyl ether to give 2-(acetylaminomethyl)-6-bromoacetylpyridine hydrobromide (3.78 g). IR (Nujol) : 1720, 1620 cm-1 NMR (CD3OD, δ): 2.10 (3H, s), 3.90 (2H, s), 4.83 (2H, s), 7.77 (1H, br s), 8.13 (2H, t, J=8 Hz) and 8.70 (1H, t, J=8 Hz)

1. temperatureThe mixture was warmed to 60° to 70° C.
2. stirringstirred for two hours
3. customThe solvent was evaporated in vacuo
4. customthe residue was triturated with diisopropyl ether