2,3-benzofuran; trifluorormethanesulfonic acid in dichloromethane T=20°C; 14 h;

1,4-diaza-bicyclo[2.2.2]octane; tert.-butylhydroperoxide; potassium iodide in water T=20°C; 48 h;

Al2O3-supported ruthenium hydroxide; air in toluene T=80°C; P=760.051 Torr; 24 h;

Al2O3-supported ruthenium hydroxide; air in toluene T=80°C; P=760.051 Torr; 24 h;

anhydrous iron chloride; dihydrogen peroxide in dichloromethane; water 16 h; RefluxAir;

iron(III) chloride in acetonitrile Oxidation; condensation; 3 h; Heating;

tert.-butylhydroperoxide; vanadium pentoxide in water T=100°C; 30 h;

HOF* CH3CN in chloroform T=0°C;

sodium tetrahydroborate; zirconium tetrachloride in tetrahydrofuran T=0 - 35°C; Reduction; 0.333333 h;

1: 80 percent / benzene / 24 h / Heating 2: 79 percent / KOH / ethanol / 1 h / 60 °C 3: 95 percent / 12M HCl / dimethylformamide; H2O / 45 h / Heating 4: 86 percent / dimethylformamide / 1 h / Heating 5: 94 percent / H2 / 10percent Pd/C / ethanol / Ambient temperature 6: NaNO2 / 1.) aq. H2SO4, 0-3 grad C then roomtemp. 30 min; 2.) 90 grad C, 30 min 7: 88 percent / K2CO3 / butan-2-one / 48 h / Heating View Scheme