1: 68 percent / propionic acid / 2 h / 136 - 139 °C 2: 90 percent / NaB4, aq. NaOH, Ni(OAr)2*4H2O, ethylenediamine, H2 / ethanol / Ambient temperature View Scheme

1: 68 percent / propionic acid / 2 h / 136 - 139 °C 2: 90 percent / NaB4, aq. NaOH, Ni(OAr)2*4H2O, ethylenediamine, H2 / ethanol / Ambient temperature 3: 89 percent / LiAlH4 / diethyl ether / 2 h / 0 °C 4: 80 percent / pyridine / 12 h / Ambient temperature View Scheme

1: 68 percent / propionic acid / 2 h / 136 - 139 °C 2: 90 percent / NaB4, aq. NaOH, Ni(OAr)2*4H2O, ethylenediamine, H2 / ethanol / Ambient temperature 3: 89 percent / LiAlH4 / diethyl ether / 2 h / 0 °C View Scheme