1: 78 percent / p-TsOH / 70 h / Ambient temperature 2: 1) lithium aluminum hydride; 2) water, 15 percent NaOH / 1) ether, RT; 2) ether, 15 min 3: 93 percent / KH / tetrahydrofuran; hexane / 1 h 4: 80 percent / conc. HCl, water / methanol; H2O / Ambient temperature 5: 91 percent / Jones reagent / acetone / 0.13 h View Scheme