Pyrazole → HCID 9992423, compound

Participants

Reaction Conditions

Reaction Steps

To a sealed tube containing dry, deoxygenated dioxane (1 mL) was added 3-fluoro-5-(4-iodo-1H-pyrazol-1-yl)benzonitrile (313 mg, 1.0 mmol), pyrazole (88 mg, 1.3 mmol), trans-diaminocyclohexane (24 μL, 0.2 mmol), potassium carbonate (304 mg, 2.2 mmol), and CuI (4 mg, 0.02 mmol). The reaction was capped and heated with stirring for 48 hr at 100° C. The resulting mixture was partitioned with EtOAc (10 mL) and H2O (10 mL). The organic layer was dried over MgSO4, filtered, and concentrated in vacuo on to a plug of silica gel, which was loaded on to a prepacked column and purified via automated flash chromatography utilizing a 5-35% EtOAc/Hexanes gradient to afford 3-(1′H-1,4′-bipyrazol-1′-yl)-5-fluorobenzonitrile as a white solid. 1H NMR (CDCl3, 500 MHz) δ 8.48 (s, 1H), 8.04 (s, 1H), 7.96 (m, 1H), 7.85-7.88 (m, 2H), 7.71 (d, 1H), 7.36 (m, 1H), 6.50 (m, 1H). MS (ESI) 254.15 (M++H).

Provenance & Evidence