1: 82 percent / PCC / CH2Cl2 / 3 h / Ambient temperature 2: 1.) t-BuOK / 1.) THF, room temperature, 2 h, 2.) 30 min 3: 93 percent / Na2CO3 / methanol / 3.5 h / Ambient temperature 4: 48 percent / SeO2, t-BuOOH / 2,2,4-trimethyl-pentane / 1.) 0 deg C, 2 h, 2.) room temperature, 4 h 5: 94 percent / imidazole / dimethylformamide / 4 h / Ambient temperature 6: 1.) n-BuLi / 1.) THF, hexane, room temperature, 20 min, 2.) room temperature, 30 min 7: 88 percent / MeONa, LiAlH4 / methanol; tetrahydrofuran / 1 h / Heating 8: 99 percent / TBAF / tetrahydrofuran / 16 h / Ambient temperature 9: 1.) p-TsOH, 2.) t-BuOMe, 9-acetoxyanthracene / 1.) dioxane, H2O, 75 deg C, 4 h, 2.) irradiation, 1 h View Scheme

1: 82 percent / PCC / CH2Cl2 / 3 h / Ambient temperature 2: 1.) t-BuOK / 1.) THF, room temperature, 2 h, 2.) 30 min 3: 1.) n-BuLi / 1.) THF, hexane, 50 deg C, 15 min, 2.) -15 deg C, 20 min; 0 deg C, 30 min 4: 78 percent / LiAlH4, MeONa / tetrahydrofuran; methanol / 15 h / Ambient temperature 5: 98 percent / n-Bu4NF / tetrahydrofuran / 3 h / Ambient temperature 6: 1.) PPTS, 2.) t-BuOMe, 9-acetoxyanthracene / 1.) MeCN, H2O, 70 deg C, 2.5 h, 2.) irradiation, 2 h View Scheme