1: Lawesson's reagent / toluene / 48 h / 90 °C 2: potassium acetate; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 36 h / 85 °C / |Inert atmosphere 3: water; dihydrogen peroxide / tetrahydrofuran; methanol 4: sodium hypochlorite / acetonitrile / 0.5 h View Scheme

1: potassium acetate; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 36 h / 85 °C / |Inert atmosphere 2: water; dihydrogen peroxide / tetrahydrofuran; methanol 3: sodium hypochlorite / acetonitrile / 0.5 h View Scheme

in N,N-dimethyl-formamide T=90 - 100°C; 24 h;

1: dimethylformamide / 24 h / 90 - 100 °C 2: 1.23 g / NaOH / methanol; H2O / 2 h View Scheme

KBrO3; sulfuric acid; potassium bromide in water; acetone 2 h;

in N,N-dimethyl-formamide 3 h; Heating;