Nitrogen → 1-bromo-4-(phenylethynyl)benzene

Participants

Reaction Steps

1-Bromo-4-iodobenzene (20.0 g, 70.7 mmol), bis(triphenylphospine)palladium(II) dichloride (PdCl2(PPh3)2) (250 mg), and CuI (68 mg) were suspended in 50 mL triethylamine (NEt3) and 100 mL tetrahydrofuran (THF). The suspension was treated with 3 cycles of evacuation and refilling with N2. Phenylacetylene (7.21 g, 7.75 mL, 1.0 eq) was added in 0.5 mL portions every 5 minutes to the stirred suspension. The solution was then stirred at room temperature for 22 hours. The solvents were then evaporated. Methylene chloride (100 mL) and 1 M HCl (aqueous) (50 mL) were added, the organic layer was retained, and then was washed again with 1 M HCl (aqueous) (50 mL) and 2×50 mL water, dried (MgSO4), filtered, and the solvent evaporated in vacuum to give 18 g of the title compound as a yellow solid, which was used without further purification.

Provenance & Evidence