反应详情

To a solution of 3-(1-ethyl-1-methoxy-propyl)-2-methyl-pyridine (0.176 g, 0.911 mmol) in CH2Cl2 (10 mL) was added 3-chloroperoxybenzoic acid (0.473 g, 2.75 mmol). The mixture was stirred for 16 h and concentrated by evaporation under vacuum. The residue was purified by flash chromatography on a silica gel column (6:1 EtOAc/MeOH), affording 3-(1-ethyl-1-methoxy-propyl)-2-methyl-pyridine I-oxide as a white solid (0.188 g, 98%). 1H NMR (CDCl3) δ 0.74 (t, 6H, J=7.5 Hz), 1.94 (q, 4H, J=7.5 Hz), 2.80 (s, 3H), 3.01 (s, 3H), 7.07-7.10 (m, 1H), 7.21 (d, 1H, J=8.1 Hz), 8.27 (d, 1H, J=6.3 Hz).

1. concentrationconcentrated by evaporation under vacuum
2. customThe residue was purified by flash chromatography on a silica gel column (6:1 EtOAc/MeOH)