Sodium Carbonate → 2-Bromo-1,1':2',1''-terphenyl

Participants

Reaction Steps

Under an atmosphere of argon, 2,2′-dibromobiphenyl (9.5 g, 30 mmole), phenylboronic acid (3.7 g, 30 mmole) and tetrakis(triphenyl-phosphine)palladium(0) (1.0 g, 0.87 mmole, 3% Pd) were dissolved into toluene (75 ml). To the obtained solution, an aqueous solution of sodium carbonate (9.7 g, 92 mmole, 3 eq/46 ml) was added. The resultant solution was heated under refluxing for 10 hours and left standing for one night. The formed organic layer was separated, washed with a saturated aqueous solution of sodium chloride (50 ml) and dried over anhydrous magnesium sulfate. Then, the solvent was removed by distillation and a dark yellow oil was obtained. The obtained oil was purified by the column chromatography (silica gel/hexane, hexane+3% dichloromethane and hexane+5% dichloromethane, successively) and a colorless oil (6.5 g, 70%) was obtained.

Provenance & Evidence