cesium fluoride in tetrahydrofuran 3 h; Heating;

sodium hydroxide in tetrahydrofuran; methanol; water 7 h;

With  sodium amalgam; palladium on activated charcoal; hydrogen in  methanol T=25°C; 48 h;   

With  sodium amalgam in  methanol T=25°C; 48 h;   

With  sodium amalgam in  methanol T=25°C; 48 h;   

Multi-step reaction with 5 steps 1: 98 percent / LiAlH4 / tetrahydrofuran / 1) 0 deg C, 1 h, 2) r.t., 30 min2: 85 percent / MCPBA / CH2Cl2 / 2 h / Ambient temperature3: 95 percent / DMAP, Et3N / CH2Cl2 / 1) 0 deg C 1 h, 2) r.t., 1 h4: 50 percent / LDA, n-BuLi, HMPT / tetrahydrofuran; hexane / 1) -20 deg C, 10 min, 2) 20 deg C, 2+20 h5: 42 percent / Na/Hg / methanol / 48 h / 25 °C