ammonium metavanadate; dihydrogen peroxide; acetic acid; potassium bromide 1 h; Ambient temperature;

Pd(OTf)2(MeCN)4; water; toluene-4-sulfonic acid; p-benozquinone in 1,4-dioxane T=20 - 80°C; P=760.051 Torr;

1: 48 percent / glacial AcOH; Br2 / 1.5 h / 15 °C 2: 94 percent / AcOH; conc. HCl / 24 h / 118 °C 3: 6.52 g / N-methylpyrrolidinone / 2 h / 163 °C 4: 93 percent / aq. KOH; H2O2 / 2 h / 130 °C 5: 97 percent / tetrahydrofuran / 6 h / 20 °C 6: 90 percent / DMAP / 3 h / 80 °C 7: 90 percent / pyridine / dimethylformamide / 2 h / 20 °C 8: 0.230 g / methanol; tetrahydrofuran / 26 h / 20 °C 9: 76 percent / 48percent aq. HBr / 7 h / 120 °C 10: 98 percent / DMAP; Et3N / CH2Cl2 / 0.5 h / 20 °C 11: 51 percent / NBS; dibenzoyl peroxide / CCl4 / 3.83 h / 85 °C / Irradiation View Scheme

1: diluted acetic acid; chlorine / 0 - 5 °C 2: sulfuric acid View Scheme

oxygen; anhydrous cobalt diacetate; sodium bromide in acetic acid T=100°C; 1.33333 h;