1: NH4COOH / Pd/C / methanol / Ambient temperature 2: LiAlH4 / diethyl ether / 15 h / Ambient temperature 3: NH2OH*HCl, Na2SO4 / H2O / 1 h / Heating 4: 1.) 90 percent aq. H2SO4, 2.) LiAlH4 / 1.) a) RT, 0.5 h, b) 80 deg C, 0.5 h, 2.) diethyl ether, RT, 1 h View Scheme