titanium superoxide; dihydrogen peroxide; acetic acid in water T=50°C; 2 h;

potassium carbonate in acetone 2 h; Heating; Yield given;

hydrogen; palladium on activated charcoal in tetrahydrofuran 6 h; Ambient temperature;

1: 96 percent / 57percent HI, 30percent aq. H3PO2 / Heating 2: 82 percent / molecular sieves 4 Angstroem / Amberlite IR 120-plus / benzene / Heating 3: K2CO3 / Bu4NHSO4 / acetone / 24 h / Heating 4: TsOH / methanol; H2O / 16 h / Ambient temperature 5: 91 percent / K2CO3 / acetone / 15 h / Heating 6: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme

copper(I) bromide in water; N,N-dimethyl-formamide T=130°C;

1: 82 percent / molecular sieves 4 Angstroem / Amberlite IR 120-plus / benzene / Heating 2: K2CO3 / Bu4NHSO4 / acetone / 24 h / Heating 3: TsOH / methanol; H2O / 16 h / Ambient temperature 4: 91 percent / K2CO3 / acetone / 15 h / Heating 5: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme

1: 97 percent / H2 / 10percent Pd/C / acetic acid / 72 h / 30002.4 Torr / Ambient temperature 2: 96 percent / 57percent HI, 30percent aq. H3PO2 / Heating 3: 82 percent / molecular sieves 4 Angstroem / Amberlite IR 120-plus / benzene / Heating 4: K2CO3 / Bu4NHSO4 / acetone / 24 h / Heating 5: TsOH / methanol; H2O / 16 h / Ambient temperature 6: 91 percent / K2CO3 / acetone / 15 h / Heating 7: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme

1: K2CO3 / Bu4NHSO4 / acetone / 24 h / Heating 2: TsOH / methanol; H2O / 16 h / Ambient temperature 3: 91 percent / K2CO3 / acetone / 15 h / Heating 4: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme

1: 91 percent / K2CO3 / acetone / 15 h / Heating 2: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme

1: TsOH / methanol; H2O / 16 h / Ambient temperature 2: 91 percent / K2CO3 / acetone / 15 h / Heating 3: 96 percent / H2 / 10percent Pd/C / tetrahydrofuran / 6 h / Ambient temperature View Scheme