Potassium Carbonate → HCID 10236212, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 2-(4bromo-1H-pyrazol-1-yl)pyridine (0.669 g, 3.0 mmol), 3-methoxyphenylboronic acid (0.453 g, 3.0 mmol) and potassium carbonate (0.828 g, 6.0 mmol) in a mixture of ethyleneglycol dimethyl ether (20 mL) and H2O (4 mL) were degassed by argon bubbling for 15 min., then tetrakis(triphenylphosphine)palladium(0) (20 mg, 0.017 mmol) was added and degassing continued a further 15 min. The resulting solution was stirred at 70° C. for 14 h, whereupon H2O (30 mL) was added, then extracted with EtOAc (3×30 mL) and the combined extracts washed with brine. The organic phase was dried over Na2SO4, concentrated in vacuo, and the crude residue was chromatographed on silica gel eluting with EtOAc:hexane (1:4) afford a white solid which was recrystallized from EtOAc/Hexane to give 2-[4(3-methoxyphenyl)-1H-pyrazol-1-yl]pyridine. MP=89-90° C. 1H NMR (CD3Cl, 300 MHz) δ 8.84 (s, 1H), 8.45 (dd, 1H), 8.03 (s, 1H), 8.02 (d, 1H), 7.84 (dd, 1H), 7.34 (t, 1H), 7.23˜7.15 (m, 3H), 6.84 (dd, 1H) 3.87 (s, 3H). MS (ESI) 252.1 (M++H).

Provenance & Evidence