1: H2, AcOH / 10percent Pd/C / 18 h / 760 Torr / Ambient temperature 2: Et3N / tetrahydrofuran; benzene / 1 h / Ambient temperature 3: 91 percent / NaIO4, KMnO4, KH2PO4, K2HPO4 / H2O; acetone / 3 h / Ambient temperature 4: 80 percent / 4 N HCl in dioxane / 1 h / Ambient temperature View Scheme