1: 97 percent / I2, NaHCO3 / ethanol; H2O / 1.5 h / 20 °C 2: 93 percent / H2, sodium acetate / 10percent Pd/C / ethanol / 3 h / 2327.2 Torr 3: 80 percent / trifluoroacetic acid / 0.25 h / 5 °C View Scheme