1.1: dichloromethane / 0 - 20 °C 2.1: diethylamino-sulfur trifluoride / dichloromethane / 1.25 h / -78 °C 2.2: 4 h / -78 - 20 °C 3.1: selenium(IV) oxide / ethyl acetate / 1 h / 75 °C 4.1: platinum(IV) oxide; hydrogen / 3040.2 Torr 5.1: 20 wt. Pd(OH)2 on activated carbon; hydrogen; trifluoroacetic acid / water / 24 h / 20 °C / 3040.2 Torr View Scheme

1: diethyl ether / 1.5 h / 0 °C 2: HBr / 0.5 h / 0 °C 3: 98 percent / AgNO3 / acetonitrile / 12 h 4: 88 percent / NaOAc*3H2O, DMSO / 0.42 h / Ambient temperature 5: 62 percent / conc. aq. HCl / ethanol / 4.5 h / 80 °C View Scheme

1: 78 percent / diethyl ether / 2 h / 0 °C 2: 97 percent / CH2Cl2 / 1 h / -10 °C 3: 90 percent / aq. Na2CO3; NaHCO3 / methanol / 1 h / 20 °C View Scheme

1.1: dichloromethane / 0 - 20 °C 2.1: diethylamino-sulfur trifluoride / dichloromethane / 1.25 h / -78 °C 2.2: 4 h / -78 - 20 °C 3.1: selenium(IV) oxide / ethyl acetate / 1 h / 75 °C 4.1: platinum(IV) oxide; hydrogen / 3040.2 Torr 5.1: 20 wt. Pd(OH)2 on activated carbon; hydrogen; trifluoroacetic acid / water / 24 h / 20 °C / 3040.2 Torr 6.1: hydrogenchloride; water / 24 h / 90 - 100 °C View Scheme

1: diethyl ether / 1.5 h / 0 °C 2: HBr / 0.5 h / 0 °C 3: 98 percent / AgNO3 / acetonitrile / 12 h 4: 88 percent / NaOAc*3H2O, DMSO / 0.42 h / Ambient temperature View Scheme

1: diethyl ether / 1.5 h / 0 °C 2: HBr / 0.5 h / 0 °C View Scheme

in diethyl ether T=0°C; 2 h;