1.1: 1H-imidazole; dimethyl sulfoxide / 20 °C / Inert atmosphere 2.1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 3.1: triethylamine / acetone / 0.08 h / 0 °C 4.1: sodium azide / acetone / 2 h / 20 °C 5.1: toluene / 2 h / Reflux; Inert atmosphere 6.1: water / 2 h / Reflux 7.1: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 9.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C 10.1: 2,6-dimethylpyridine; trifluoromethylsulfonic anhydride / dichloromethane / 0.5 h / -78 - -40 °C 10.2: 14 h / -40 - 0 °C View Scheme

1.1: 1H-imidazole; dimethyl sulfoxide / 20 °C / Inert atmosphere 2.1: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 3.1: triethylamine / acetone / 0.08 h / 0 °C 4.1: sodium azide / acetone / 2 h / 20 °C 5.1: toluene / 2 h / Reflux; Inert atmosphere 6.1: water / 2 h / Reflux 7.1: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 9.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C 10.1: 2,6-dimethylpyridine; trifluoromethylsulfonic anhydride / dichloromethane / 0.5 h / -78 - -40 °C 10.2: 14 h / -40 - 0 °C View Scheme

1: 1H-imidazole; dimethyl sulfoxide / 20 °C / Inert atmosphere 2: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 3: triethylamine / acetone / 0.08 h / 0 °C 4: sodium azide / acetone / 2 h / 20 °C 5: toluene / 2 h / Reflux; Inert atmosphere 6: water / 2 h / Reflux 7: tetrabutyl ammonium fluoride / methanol / 2 h / 20 °C View Scheme

1: 1H-imidazole; dimethyl sulfoxide / 20 °C / Inert atmosphere 2: water; lithium hydroxide hydrate / acetonitrile / 4 h / 50 - 60 °C 3: triethylamine / acetone / 0.08 h / 0 °C 4: sodium azide / acetone / 2 h / 20 °C 5: toluene / 2 h / Reflux; Inert atmosphere 6: water / 2 h / Reflux 7: sodium tetrahydroborate / methanol / 0.17 h / 0 - 20 °C / Inert atmosphere 8: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 9: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 30 h / 20 °C View Scheme