1-Ethynyl-4-fluorobenzene → 4-[2-(4-Fluorophenyl)ethynyl]-2-(methylthio)pyrimidine

Participants

Reaction Steps

4-Iodo-2-(methylthio)pyrimidine (35.7 g, 142 mmol) and 1-ethynyl-4-fluorobenzene (17.0 g, 142 mmol) were added to triethylamine (200 mL) at room temperature. To the resulting solution were added dichlorobis(triphenylphosphine)palladium(II) (1.0 g, 1.4 mmol) and copper iodide (1.0 g, 5.2 mmol). Then the reaction mixture was stirred under a nitrogen atmosphere at room temperature for 18 h. The reaction mixture was concentrated under reduced pressure to remove excess triethylamine. The residue was partitioned between water (400 mL) and dichloromethane (400 mL). The organic layer was washed with water (2×400 mL) and dried (MgSO4), and the solvent was evaporated under reduced pressure to give an oil. Flash chromatographic purification on silica gel with 0 to 50% ethyl acetate/hexanes as eluant gave 18.3 g of the title compound as a light brown solid.

Provenance & Evidence