反应详情

2-Chloro-4-((6-methylpyridin-3-yl)methoxy)pyridine (4.20 g, 17.9 mmol) and ammonium acetate (6.91 g, 89.7 mmol) were heated at 110° C. in a mixture of formic acid (20 mL) and water (20 mL) for 5 days. The mixture was concentrated to remove most of the liquid and then adjusted to pH 8 with NaHCO3 solution. The solid was filtered off to provide the title compound (3.0 g, 77%) as a white solid: 1H NMR (300 MHz, DMSO-d6) δ 11.27-11.04 (br s, 1H), 8.51 (s, 1H), 7.73 (d, J=7.1 Hz, 1H), 7.29-7.24 (m, 2H), 5.89 (d, J=7.2 Hz, 1H), 5.82 (s, 1H), 5.05 (s, 2H), 2.50 (s, 3H).

1. concentrationThe mixture was concentrated
2. customto remove most of the liquid
3. filtrationThe solid was filtered off