反应详情

温度

20 °C

To a degassed mixture of 7-bromo-8-(4-chlorophenyl)-2-(methoxymethyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (300 mg, 0.81 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (332 mg, 1.62 mmol) and K2CO3 (280 mg, 2.0 mmol) in 1,4-dioxane (10 mL) and H2O (3.0 mL) under argon at 20° C. was added Pd(PPh3)4 (47 mg, 0.043 mmol). The reaction mixture was refluxed for 15 h under argon and then cooled to 20° C. The reaction mixture was diluted with H2O (10 mL) and extracted with EtOAc (3×20 mL). The combined organic extract was washed with saturated aqueous NaHCO3 solution (20 mL), then brine (20 mL), dried over MgSO4, filtered and concentrated in vacuo. The crude product was purified by silica gel column chromatography eluting with a 0-60% gradient of EtOAc in hexanes to obtain the title compound as a yellow solid (241 mg, 0.65 mmol). MS: [M+H]+=367.2. 1H NMR (400 MHz, CDCl3) δ 3.45 (s, 3H), 5.32 (s, 2H), 6.59 (d, J=7.03 Hz, 1H), 7.04 (d, J=6.15 Hz, 2H), 7.18-7.23 (m, 2H), 7.26-7.30 (m, 2H), 7.85 (d, J=7.47 Hz, 1H), 8.53 (d, J=6.15 Hz, 2H).

1. temperatureThe reaction mixture was refluxed for 15 h under argon
2. extractionextracted with EtOAc (3×20 mL)
3. extractionThe combined organic extract
4. washwas washed with saturated aqueous NaHCO3 solution (20 mL)
5. dry with materialbrine (20 mL), dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude product was purified by silica gel column chromatography
9. washeluting with a 0-60% gradient of EtOAc in hexanes