Sodium Carbonate → 2-(2-methylphenyl)thiophene

Participants

Reaction Steps

Sodium carbonate (5 ml., 2M aqueous solution) followed by 2-methylphenylboronic acid (0.294 g, 2.4 mmol) were added to a solution of 2-bromothiophene (0.542 g, 2 mmol) and tetrakis(triphenylphosphine)-palladium(O) (100 mg) in toluene (5 ml) and ethanol (5 ml) under nitrogen. The mixture was refluxed for 2 hours, cooled to room temperature and extracted with ethyl acetate (2×50 ml). The combined organic layers was dried over MgSO4 and evaporated. The residue was flash chromatographed on silica gel using hexane as eluent to afford 1.2 g of 2-(2-tolyl)thiophene as a colorless gum.

Provenance & Evidence