Toluene → HCID 67400748, compound

Participants

Reaction Steps

2-methylphenyl boronic acid (5.1 g, 37.59 mmol), 2-phenyl-5-bromopyridine (8.0 g, 34.17 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (561 mg, 1.366 mmol), and potassium phosphate tribasic (23.50 g, 102.51 mmol), 250 mL of toluene and 25 mL of water were placed in a 1 L round-bottom flask. Nitrogen was bubbled directly into the mixture for 30 min after which tris(dibenzylideneacetone)dipalladium(0) (312 mg, 0.341 mmol) was added. Nitrogen was then bubbled for another 15 minutes and the reaction mixture was heated to reflux for 16 h under nitrogen. The mixture was cooled and the organic layer was separated from the aqueous layer. The organic layer was washed with saturated brine solution, dried over magnesium sulfate, filtered, and the solvent removed under vacuum to give an off-white solid as the crude. The crude was purified by column chromatography using silica gel as the stationary phase and 2% ethyl acetate in hexanes as the mobile phase. 6.5 g of desired product was obtained after purification (78% yield).

Provenance & Evidence