反应详情

3-Bromo-4-chloronitrobenzene (5.17 g, 21.9 mmol) was reacted with pyridine-3-boronic acid-1,3-propanediol cyclic ester (4.27 g, 26.2 mmol) over 24 h, as described in Example 62. The resulting crude residue was purified by column chromatography on silica, using 50% diethyl ether in dichloromethane as the eluent, to yield 3-(2-chloro-5-nitrophenyl)pyridine (3.53 g, 69%): δH (360 MHz, CDCl3) 7.42-7.48 (1H, m), 7.70 (1H, d, J 8.7), 7.81 (1H, dt, J 8.0 and 1.8), 8.17-8.27 (2H, m), 8.68-8.77 (2H, m).

1. customThe resulting crude residue was purified by column chromatography on silica