1: 87 percent / ZnI2 / 1.25 h / 70 °C 2: 100 percent / H2, HCl / 10 percent Pd/C / methanol / 14 h / Ambient temperature 3: 85 percent / NaNO2, AcOH / H2O / 0 deg C, 1.75 h; 60 deg C, 2 h; 66 deg C, 1.25 h 4: 96 percent / LiAlH4 / diethyl ether / 2.25 h / Ambient temperature 5: BF3, Et3SiH / CH2Cl2 / 0.17 h / Ambient temperature View Scheme