1.1: 85 percent / Br2; (Bu3Sn)2O; MS-4A / CH2Cl2 / 0.25 h / -78 °C 2.1: 91 percent / Dess-Martin periodinane / acetonitrile; CH2Cl2 / 0.25 h 3.1: Zn / acetic acid / 0.03 h 4.1: Dess-Martin periodinane / acetonitrile; CH2Cl2 / 0.25 h 4.2: 60 percent / dimethyldioxirane; (R,R)-(PhCH-NTs)2BCl; TEA / CH2Cl2 / 0.5 h / -78 °C 5.1: NH2OH*HCl; TEA / methanol / 0.5 h 6.1: CDI / tetrahydrofuran / 0.75 h 7.1: 68 percent / polyposphoric acid / 0.75 h / 100 °C 8.1: 80 percent / formic acid / 1 h / 80 °C 9.1: 88 percent / BBr3 / CH2Cl2 / 15 h / 0 - 20 °C 10.1: 75 percent / O2; TPP / CHCl3 / 0.17 h / 20 - 40 °C / Irradiation 11.1: 62 percent / H2 / Pt-black / dioxane / 8 h / 2280 Torr View Scheme