1: 88 percent / K2CO3/KI / various solvent(s) / 20 h / 120 °C 2: 91 percent / NaOH (aq.) / dioxane / 1) room temperature, 10 min, 2) 50 deg C, 5 min 3: 83 percent / H2 / Pd/C (10 percent Pd) / methanol / Ambient temperature 4: 80 mg / Pb2O / CHCl3 / 0.08 h 5: 94 percent / HNO3 (65 percent) / 0.03 h View Scheme

1: 88 percent / K2CO3/KI / various solvent(s) / 20 h / 120 °C 2: 91 percent / NaOH (aq.) / dioxane / 1) room temperature, 10 min, 2) 50 deg C, 5 min 3: 83 percent / H2 / Pd/C (10 percent Pd) / methanol / Ambient temperature 4: 81 percent / 1) Ag2O, 2) HNO3 (65 percent) / CHCl3 / 1) room temperature, 2 h View Scheme