1: 94 percent / pyridine / 3 h / 0 °C 2: 71 percent / NaN3 / dimethylsulfoxide; H2O / 16 h / 90 °C 3: 25 percent / LiAlH4 / diethyl ether / 3 h / Ambient temperature 4: 50.2 percent Chromat. / NaNO2, 2N HClO4 / H2O / 1 h View Scheme

1: 94 percent / pyridine / 3 h / 0 °C 2: 71 percent / NaN3 / dimethylsulfoxide; H2O / 16 h / 90 °C 3: 25 percent / LiAlH4 / diethyl ether / 3 h / Ambient temperature 4: 9.1 percent Chromat. / NaNO2, 2N HClO4 / H2O / 1 h View Scheme