1.1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 2.1: triethylamine / acetone / 0.08 h / 0 °C 3.1: sodium azide / acetone / 2 h / 20 °C 4.1: toluene / 2 h / Reflux; Inert atmosphere 5.1: water / 2 h / Reflux 6.1: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 7.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 8.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C 9.1: 2,6-dimethylpyridine; trifluoromethylsulfonic anhydride / dichloromethane / 0.5 h / -78 - -40 °C 9.2: 14 h / -40 - 0 °C View Scheme

1.1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 2.1: triethylamine / acetone / 0.08 h / 0 °C 3.1: sodium azide / acetone / 2 h / 20 °C 4.1: toluene / 2 h / Reflux; Inert atmosphere 5.1: water / 2 h / Reflux 6.1: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 7.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 8.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C 9.1: 2,6-dimethylpyridine; trifluoromethylsulfonic anhydride / dichloromethane / 0.5 h / -78 - -40 °C 9.2: 14 h / -40 - 0 °C View Scheme

1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 2: triethylamine / acetone / 0.08 h / 0 °C 3: sodium azide / acetone / 2 h / 20 °C 4: toluene / 2 h / Reflux; Inert atmosphere 5: water / 2 h / Reflux 6: tetrabutyl ammonium fluoride / methanol / 2 h / 20 °C View Scheme

1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 2: triethylamine / acetone / 0.08 h / 0 °C 3: sodium azide / acetone / 2 h / 20 °C 4: toluene / 2 h / Reflux; Inert atmosphere 5: water / 2 h / Reflux 6: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 7: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 8: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C View Scheme