反应详情

温度

100 °C

A 50 mL round bottom flask charged with tert-butyl 4-(5-cyclopropyl-3-iodo-1-(4-methoxybenzyl)-1H-pyrazolo[3,4-b]pyridin-4-yl)piperazine-1-carboxylate (500 mg, 0.85 mmol), triethylamine (355 μL, 2.54 mmol), Pd2dba3 (19.4 mg, 0.021 mmol), tri-o-tolylphosphine (19.4 mg, 0.064 mmol), and DMF (7 mL) was purged under N2 (3 cycles). 3-vinylpyridine (270.24 mg, 1.7 mmol) was added, and the mixture was stirred at 100° C. under a N2 atmosphere for 6 hours. The reaction mixture was cooled to room temperature, diluted with warm EtOAc (100 mL) and washed with water (2×30 mL). The phases were separated, and the organic layer was dried (MgSO4), filtered, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (Biotage Flash 40S+) eluting with 25% EtOAc/hexane followed by 50% EtOAc/hexane to provide (E)-tert-butyl 4-(5-cyclopropyl-1-(4-methoxybenzyl)-3-(2-(pyridin-3-yl)vinyl)-1H-pyrazolo[3,4-b]pyridin-4-yl)piperazine-1-carboxylate (390 mg, 81% yield) as a solid. LCMS (APCI+) m/z 567.3 (M+H)+.

1. customwas purged under N2 (3 cycles)
2. temperatureThe reaction mixture was cooled to room temperature
3. washwashed with water (2×30 mL)
4. customThe phases were separated
5. dry with materialthe organic layer was dried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified by flash chromatography on silica gel (Biotage Flash 40S+)
9. washeluting with 25% EtOAc/hexane