1: 87 percent / conc. HCl / methanol; dioxane 2: 92 percent / 30percent H2O2, 5percent NaOH / methanol; dioxane 3: 1.) BF3*Et2O, 2.) NaBH4 / 1.) benzene, 0 deg C, 2.) THF 4: 66 percent / H2 / 10percent Pd-C / methanol 5: BF3-Et2O / 5 °C 6: 66 percent / (i-Pr)2NEt / CH2Cl2 7: 91 percent / 1M NaOH / methanol 8: 95 percent / MnO2 / CH2Cl2 9: 94 percent / NaOH / ethanol 10: 96 percent / 30percent H2O2, 5percent NaOH / methanol 11: 19 percent / conc. HCl / methanol / 70 °C View Scheme