1.1: 1H-imidazole; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 4 h / 0 - 25 °C / Inert atmosphere 2.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 3.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 4.1: magnesium / tetrahydrofuran / 0.5 h / 20 - 25 °C / Inert atmosphere 4.2: 1 h / Inert atmosphere 5.1: pyridinium p-toluenesulfonate / dichloromethane / 0.5 h / 20 °C / Inert atmosphere 6.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 5 h / 0 - 20 °C / Inert atmosphere 7.1: triphenylphosphine; diethylazodicarboxylate / diethyl ether; benzene / 14 h / 20 °C 8.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 9.1: RuCl2(tricyclohexylphosphine)2(benzylidene) / toluene / 23 h / 80 °C / Inert atmosphere 10.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 11.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide / benzene / 10 °C View Scheme

1.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 2.1: magnesium / tetrahydrofuran / 0.5 h / 20 - 25 °C / Inert atmosphere 2.2: 1 h / Inert atmosphere 3.1: pyridinium p-toluenesulfonate / dichloromethane / 0.5 h / 20 °C / Inert atmosphere 4.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 5 h / 0 - 20 °C / Inert atmosphere 5.1: triphenylphosphine; diethylazodicarboxylate / diethyl ether; benzene / 14 h / 20 °C 6.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 7.1: RuCl2(tricyclohexylphosphine)2(benzylidene) / toluene / 23 h / 80 °C / Inert atmosphere 8.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 9.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide / benzene / 10 °C View Scheme

1.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 2.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 3.1: magnesium / tetrahydrofuran / 0.5 h / 20 - 25 °C / Inert atmosphere 3.2: 1 h / Inert atmosphere 4.1: pyridinium p-toluenesulfonate / dichloromethane / 0.5 h / 20 °C / Inert atmosphere 5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 5 h / 0 - 20 °C / Inert atmosphere 6.1: triphenylphosphine; diethylazodicarboxylate / diethyl ether; benzene / 14 h / 20 °C 7.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 8.1: RuCl2(tricyclohexylphosphine)2(benzylidene) / toluene / 23 h / 80 °C / Inert atmosphere 9.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 10.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide / benzene / 10 °C View Scheme

1.1: (R,R)-Co-salen; acetic acid / water; toluene / 20 °C / Cooling with ice 2.1: lithium aluminium tetrahydride / tetrahydrofuran / 4 h / 0 - 20 °C / Inert atmosphere 3.1: 1H-imidazole; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 4 h / 0 - 25 °C / Inert atmosphere 4.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 5.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 6.1: magnesium / tetrahydrofuran / 0.5 h / 20 - 25 °C / Inert atmosphere 6.2: 1 h / Inert atmosphere 7.1: pyridinium p-toluenesulfonate / dichloromethane / 0.5 h / 20 °C / Inert atmosphere 8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 5 h / 0 - 20 °C / Inert atmosphere 9.1: triphenylphosphine; diethylazodicarboxylate / diethyl ether; benzene / 14 h / 20 °C 10.1: pyridinium p-toluenesulfonate / ethanol / 1 h / 60 °C 11.1: RuCl2(tricyclohexylphosphine)2(benzylidene) / toluene / 23 h / 80 °C / Inert atmosphere 12.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane; dimethyl sulfoxide / 0.5 h / 20 °C / Inert atmosphere 13.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide / benzene / 10 °C View Scheme

1.1: acetic acid / ethanol / |Reflux 2.1: n-butyllithium / tetrahydrofuran / 0 °C 2.2: 0 °C 3.1: toluene-4-sulfonic acid / benzene / 80 °C 4.1: tetrabutyl ammonium fluoride / tetrahydrofuran 5.1: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 6.1: Grubb's 2nd generation catalyst / toluene / 80 °C 7.1: toluene-4-sulfonic acid / water; acetone / 40 °C 8.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1: trichlorophosphate / 4 h / 100 °C 2: tetrakis(triphenylphosphine) palladium(0) / toluene / 8 h / 100 °C 3: sodium dihydrogenphosphate; sodium chlorite; 2-methyl-but-2-ene / tetrahydrofuran; tert-butyl alcohol; water / 5 h / 20 °C 4: 2,4,6-tri-fluoro-1,3,5-triazine; pyridine 5: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 6: Grubb's 2nd generation catalyst / toluene / 80 °C 7: toluene-4-sulfonic acid / water; acetone / 40 °C 8: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1.1: n-butyllithium / tetrahydrofuran / 0 °C 1.2: 0 °C 2.1: toluene-4-sulfonic acid / benzene / 80 °C 3.1: tetrabutyl ammonium fluoride / tetrahydrofuran 4.1: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 5.1: Grubb's 2nd generation catalyst / toluene / 80 °C 6.1: toluene-4-sulfonic acid / water; acetone / 40 °C 7.1: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1: toluene-4-sulfonic acid / benzene / 80 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran 3: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 4: Grubb's 2nd generation catalyst / toluene / 80 °C 5: toluene-4-sulfonic acid / water; acetone / 40 °C 6: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1: tetrabutyl ammonium fluoride / tetrahydrofuran 2: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 3: Grubb's 2nd generation catalyst / toluene / 80 °C 4: toluene-4-sulfonic acid / water; acetone / 40 °C 5: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme

1: potassium hexamethylsilazane / tetrahydrofuran / 0 °C 2: Grubb's 2nd generation catalyst / toluene / 80 °C 3: toluene-4-sulfonic acid / water; acetone / 40 °C 4: aluminium(III) iodide; tetra-(n-butyl)ammonium iodide; 1,3,5-trishydroxybenzene / benzene / 5 °C View Scheme