反应详情

温度

80 °C

4-chloro-6-methylpicolinonitrile (4.0 g, 26 mmol, 1.0 eq), 5-hydroxypyrimidine (5.56 g, 57.9 mmol, 2.20 eq), K2CO3 (7.24 mg, 52.4 mmol, 2.0 eq) and DMF (66 mL) were added to a reaction vessel and heated at 80° C. for 16 hours. The reaction was filtered and concentrated on silica gel (25 g). The silica gel was loaded on top of a fresh bed of silica gel and washed with 50% ethyl acetate/hexane. The solvents were removed in vacuo and the crude solid was purified by flash chromatography on silica gel to afford 4.31 g (77%) of the title compound as a pale-yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 9.17 (s, 1H), 8.85 (s, 2H), 7.74 (d, J=2.4 Hz, 1H), 7.32 (d, J=2.3 Hz, 1H), 2.48 (s, 3H); ES-MS [M+1]+: 213.2.

1. filtrationThe reaction was filtered
2. concentrationconcentrated on silica gel (25 g)
3. washwashed with 50% ethyl acetate/hexane
4. customThe solvents were removed in vacuo
5. customthe crude solid was purified by flash chromatography on silica gel