反应详情

2,4-Dimethyl-pyridine 1-oxide (24.6 g, 0.2 mol) was stirred in acetic anhydride (200 ml) in an oil bath (140-150° C.) for 4 hr. After cooling to room temperature, the mixture was evaporated in vacuo and the residue was purified by silica gel column chromatography (eluent, ether:hexane (2:1)) to afford 5.1 g (15%) of acetic acid 2-methyl-pyridin-4-ylmethyl ester as a colorless oil. 1H NMR (200 MHz, CDCl3) δ 2.15 (3H, s), 2.56 (3H, s), 5.08 (2H, s), 7.05 (1H, d, J=5.0 Hz), 7.11 (1H, s), 8.48 (1H, d, J=5.0 Hz).

1. customthe mixture was evaporated in vacuo
2. customthe residue was purified by silica gel column chromatography (eluent, ether:hexane (2:1))