反应详情

温度

100 °C

To a stirred solution of 5-bromo-1-(4-methoxybenzyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine (7) (139 mg, 0.418 mmol) in 1,2-dimethoxyethane (10 mL) was added 2-chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (99) (100 mg, 0.418 mmol) and Cs2CO3 (32 mg, 0.104 mmol). The resulting reaction mixture was degassed, purged with N2 for 15 min, Pd(PPh3)4 (19 mg, 0.0167 mmol) was added and the mixture purged again under nitrogen for another 15 min. The reaction mass was heated at 100° C. in a sealed tube for 12 h. After completion of the reaction the reaction mass was partitioned between ethyl acetate and water and the organic layer was separated and extracted with ethyl acetate. The combined organic layer was dried over Na2SO4 and the solvent completely distilled off to get the crude product. The crude material was passed through 100-200 mesh silica gel eluting the pure compound at 50% ethyl acetate in hexane to yield off white colored solid compound 5-(6-chloropyridin-2-yl)-1-(4-methoxybenzyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine 100 (60 mg).

1. customThe resulting reaction mixture
2. customwas degassed
3. custompurged with N2 for 15 min
4. customthe mixture purged again under nitrogen for another 15 min
5. customAfter completion of the reaction the reaction mass
6. customwas partitioned between ethyl acetate and water
7. customthe organic layer was separated
8. extractionextracted with ethyl acetate
9. dry with materialThe combined organic layer was dried over Na2SO4
10. distillationthe solvent completely distilled off
11. customto get the crude product