6-Chloro-1-(6-fluoropyridin-2-yl)-1H-pyrazolo[4,3-c]pyridine → 6-(6-Ethylpyrazin-2-yl)-1-(6-fluoro-2-pyridyl)pyrazolo[4,3-c]pyridine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 6-chloro-1-(6-fluoro-2-pyridyl)pyrazolo[4,3-c]pyridine (85 mg; 0.34 mmol) and tetrakis(triphenylphosphine)palladium (40 mg, 0.034 mmol) in N,N-dimethylacetamide; 2.0 mL was added (6-ethylpyrazin-2-yl)-trimethyl-stannane (185 mg, 0.684 mmol). The reaction was purged with N2 for 5 min then heated at 150° C. for 45 min in biotage microwave. The reaction mixture was filtered through celite and concentrated. The crude product was diluted with EtOAc then washed with water. The organic layers was dried with sodium sulfate, filtered, and concentrated in vacuum. The crude product was purified by flash chromatography (EtOAc/Heptane eluted at 50% EtOAc) to give 6-(6-ethylpyrazin-2-yl)-1-(6-fluoro-2-pyridyl)pyrazolo[4,3-c]pyridine (45 mg) in 41% yield. MS (ESI) m/z: 321.2

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