1: 1.) hydrazine monohydrate 2.) HCl / 1.) ethanol, reflux 2.) ethanol, reflux, 2h 2: triethylamine / CH2Cl2 / Ambient temperature View Scheme

Multi-step reaction with 4 steps 1: 1.) hydrazine monohydrate 2.) HCl / 1.) ethanol, reflux 2.) ethanol, reflux, 2h2: triethylamine / CH2Cl2 / Ambient temperature3: LiAlD4 / tetrahydrofuran / 3 h / Ambient temperature4: H2O / 0.5 h / Heating