1: 96.3 percent / p-TsOH*H2O / toluene / 1 h / Heating 2: 97.3 percent / NaBH4 / tetrahydrofuran; ethanol; H2O / 2 h / Ambient temperature 3: 100 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 38.5 h / Ambient temperature 4: 89.3 percent / Bu4NF / tetrahydrofuran / 2 h / Ambient temperature 5: 74.5 percent / Pr4NRuO4, N-methylmorpholine-N-oxide, MS 4Angstroem / CH2Cl2 / 1 h / Ambient temperature 6: 1.) n-BuLi / 1.) hexane, 0 deg C, 3 h, 2.) hexane, THF, RT, 5 h 7: 99.5 percent / H2 / 10percent Pd/C / ethyl acetate / Ambient temperature 8: 81.7 percent / 90percent aq. AcOH / 22.5 h / Ambient temperature 9: 62.6 percent / 1,5-dimethoxynaphthalene, NaBH4 / ethanol; H2O / 10 h / Ambient temperature; Irradiation View Scheme