反应详情

4,4′-Dimethyl-2,2′-bipyridyl (4.8 g, 26 mmol) and 3-chloroperbenzoic acid (77%, 8.7 g, 39 mmol) were dissolved in chloroform (25 ml), and the mixture was stirred at room temperature for 24 hrs. The solvent was evaporated, and the residue was subjected to a silica gel column chromatography. The fractions eluted with ethyl acetate-methanol (4:1, v/v) were collected, concentrated and crystallized from dimethyl ether to give the titled compound (3.7 g, 71%).

1. customThe solvent was evaporated
2. washThe fractions eluted with ethyl acetate-methanol (4:1
3. customv/v) were collected
4. concentrationconcentrated
5. customcrystallized from dimethyl ether