反应详情

This reaction was carried out as described in Example 37, step a, using 1,3-dibromobenzene (8.7 g, 36.8 mmol) and pyridine-3-boronic acid 1,3-propanediol cyclic ester (4.0 g, 24.5 mmol) in ethanol (60 ml) for 14 h. The resulting crude residue was purified by column chromatography (silica gel, 80% Et2O/hexane) to yield the title compound (3.66 g, 64%): 1H NMR (360 MHz, CDCl3) δ 7.30-7.42 (2H, m), 7.47-7.60 (2H, m), 7.72 (1H, s), 7.84 (1H, dt, J 8.0, 2.0 Hz), 8.62 (1H, dd, J 4.8, 1.5 Hz), 8.83 (1H, s).

1. customfor 14 h
2. customThe resulting crude residue was purified by column chromatography (silica gel, 80% Et2O/hexane)