1: (AcO)2Cu / acetic acid; H2O / 0.67 h / Heating 2: 85percent hydrazine hydrate / butan-1-ol / Heating 3: O2, CuCl / pyridine 4: LiAlH4 / bis-(2-methoxy-ethyl) ether / 15 °C 5: acetic acid / 10 h / 50 °C View Scheme

1: (AcO)2Cu / acetic acid; H2O / 0.67 h / Heating 2: 85percent hydrazine hydrate / butan-1-ol / Heating 3: O2, CuCl / pyridine 4: acetic acid / 10 h / 50 °C 5: H2 / P-2 Ni View Scheme

Multi-step reaction with 4 steps 1: (AcO)2Cu / acetic acid; H2O / 0.67 h / Heating2: 85percent hydrazine hydrate / butan-1-ol / Heating3: O2, CuCl / pyridine4: LiAlH4 / bis-(2-methoxy-ethyl) ether / 15 °C  

With  copper diacetate in  water; acetic acid 0.666667 h;  Heating;   

Multi-step reaction with 2 steps 1: (AcO)2Cu / acetic acid; H2O / 0.67 h / Heating2: 85percent hydrazine hydrate / butan-1-ol / Heating