Potassium Carbonate → HCID 90463299, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (R/S) 3-iodo-1-(oxan-2-yl)-1H-pyrazole-4-carbaldehyde (800 mg, 2.61 mmol, 1.00 equiv), 1-ethenyl-4-fluorobenzene (957 mg, 7.84 mmol, 3.00 equiv), Pd(PPh3)4 (302 mg, 0.26 mmol, 0.10 equiv) and potassium carbonate (1082 mg, 7.83 mmol, 3.00 equiv) in N,N-dimethylformamide (10 mL) was stirred under nitrogen at 100° C. overnight. The reaction was cooled to room temperature then quenched by the addition of 100 mL of water. The resulting mixture was extracted with 3×100 mL of ethyl acetate. The combined organic layers was washed with 3×100 mL of brine, dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was purified on a silica gel column eluted with 1-15% ethyl acetate in petroleum ether to give 220 mg (28%) of (E)-3-(4-fluorostyryl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-4-carbaldehyde as a yellow oil. LCMS (method D, ESI): RT=1.49 min, m/z=301.0 [M+H]+.

Provenance & Evidence