反应详情

To a stirred solution of 1-(6-methoxy-4-methyl-pyridin-3-yl)-propan-1-ol (445 mg, 2.45 mmol, 1 eq.) in CHCl3 (10 ml) is added activated manganese dioxide (4.3 g, 49 mmol, 20 eq.) in one portion at RT. The reaction mixture is heated at reflux for 48 h. After cooling to RT, the mixture is filtered through Celite® (filter material) and concentrated under reduced pressure. The resulting crude residue is purified by column chromatography on silica gel eluting with 10% EtOAc/iso-hexane to yield 1-(6-methoxy-4-methyl-pyridin-3-yl)-propan-1-one as a white solid. MS: m/z 180.1 [M+H]+; 1H NMR (400 MHz, CDCl3) δ 1.2 (t, 3H), 2.55 (s, 3H), 2.95 (q, 2H), 4.00 (s, 3H), 6.60 (s, 1H), 8.65 (s, 1H).

1. temperatureThe reaction mixture is heated
2. temperatureat reflux for 48 h
3. filtrationthe mixture is filtered through Celite® (filter material)
4. concentrationconcentrated under reduced pressure
5. customThe resulting crude residue is purified by column chromatography on silica gel eluting with 10% EtOAc/iso-hexane