1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione in water T=25°C; 24 h; Micellar solution;

1: 95 percent / ZnI2 / CH2Cl2 / 0.25 h / solid CO2-tetrachloromethane-bath 2: 1) BH3*Me2S, 2) aq. NaOH, 30percent H2O2 / 1) hexane, toluene, a) r.t., 3.5 h, b) reflux, 1.5 h, 2) EtOH, reflux, 1 h 3: 81 percent / NaI, ClSiMe3 / acetonitrile / Heating 4: 47 percent / amberlyst-supported nitrite reagent / benzene / 48 h View Scheme

palladium dichloride in methanol T=40°C; 18 h; Inert atmosphereGreen chemistry; chemoselective reaction;

1: 93 percent / oxalic acid / H2O / 6 h / Heating 2: 1.) formic acid, 30 percent hydrogen peroxide; 2.) 20 percent H2SO4 / 1.) 35 deg C, 2 h, room temp., 12 h; 2.) reflux, 10 h View Scheme

1: 72 percent / POCl3 / 100 °C 2: 81 percent / Ag2O / ethanol; H2O / 20 °C 3: 91 percent / H2 / Pd/C / ethanol / 20 °C View Scheme

toluene-4-sulfonic acid in toluene 1 h; Heating / reflux;

zirconium tetrachloride in acetonitrile T=20°C; 0.75 h;

pyridine T=-78°C; 0.5 h;