1: 78 percent / LiAlH4 / tetrahydrofuran / 24 h / Heating 2: 71 percent / pyridine, Cr2O3, kieselguhr / CH2Cl2 / 0.33 h / Ambient temperature View Scheme

Multi-step reaction with 3 steps 1: 93 percent / Zn, chlorotrimethylsilane / CH2Cl2 / 0.5 h / 0 °C2: 75 percent / pyridine, Cr2O3, kieselguhr / CH2Cl2 / 0.33 h / Ambient temperature3: 79 percent / silica gel, 15percent H2SO4 / CH2Cl2 / 24 h / Ambient temperature  

With  lithium aluminium tetrahydride in  tetrahydrofuran 24 h;  Heating;