1: NaOH / ethanol 2: 88 percent / NaOH, hydrogen / tris(triphenylphosphine)rhodium(I) chloride / ethanol / 2068.6 Torr / Ambient temperature 3: 88 percent / sulfuric acid / 17 h / Heating 4: 92 percent / triethylamine / CH2Cl2 / 0 °C 5: 66 percent / palladium(II) acetate, triphenylphosphine, lithium bromide, triethylamine / toluene / 6 h / 100 °C / other reagent: tri-o-tolylphosphine View Scheme