1: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 2: iodine; sodium hydrogencarbonate / ethanol; water / 20 °C / Inert atmosphere 3: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 4: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 2: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: tetrafluoroboric acid diethyl ether complex / 1,2-dichloro-ethane / 40 - 90 °C / Inert atmosphere 2: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 3: iodine; sodium hydrogencarbonate / ethanol; water / 20 °C / Inert atmosphere 4: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 5: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: sodium / 120 - 190 °C / Inert atmosphere 2: sulfuryl dichloride; acetic acid / 20 °C / Inert atmosphere 3: tetrafluoroboric acid diethyl ether complex / 1,2-dichloro-ethane / 40 - 90 °C / Inert atmosphere 4: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 5: iodine; sodium hydrogencarbonate / ethanol; water / 20 °C / Inert atmosphere 6: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 7: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: sulfuryl dichloride; acetic acid / 20 °C / Inert atmosphere 2: tetrafluoroboric acid diethyl ether complex / 1,2-dichloro-ethane / 40 - 90 °C / Inert atmosphere 3: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 4: iodine; sodium hydrogencarbonate / ethanol; water / 20 °C / Inert atmosphere 5: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 6: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1.1: bromine / tert-butyl methyl ether / 20 °C / Inert atmosphere 2.1: hydrogenchloride / methanol; water / 11 h / 50 °C 3.1: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 4.1: trifluoroacetic acid / 1.17 h / 0 °C / Inert atmosphere 4.2: 0 - 5 °C / Inert atmosphere 5.1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 6.1: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1.1: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 2.1: trifluoroacetic acid / 1.17 h / 0 °C / Inert atmosphere 2.2: 0 - 5 °C / Inert atmosphere 3.1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 4.1: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: tetrafluoroboric acid diethyl ether complex / 1,2-dichloro-ethane / 40 - 90 °C / Inert atmosphere 2: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 3: iodine; sodium hydrogencarbonate / ethanol; water / 20 °C / Inert atmosphere 4: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 5: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1.1: trifluoroacetic acid / 1.17 h / 0 °C / Inert atmosphere 1.2: 0 - 5 °C / Inert atmosphere 2.1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 3.1: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 2: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme