potassium acetate; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct in 1,4-dioxane T=80°C; 12.5 h; Inert atmosphere;

1.1: diethyl ether / 12 h / 20 °C / Cooling with ice 2.1: dipyridinium dichromate / N,N-dimethyl-formamide / 12 h / 20 °C 3.1: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 4.1: sodium hydride / tetrahydrofuran; paraffin oil (nujol) / 0.17 h / 0 °C 4.2: 12 h / 20 °C 5.1: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme

1.1: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 2.1: sodium hydride / tetrahydrofuran; paraffin oil (nujol) / 0.17 h / 0 °C 2.2: 12 h / 20 °C 3.1: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme

1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 12 h / 20 °C 2.1: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 3.1: sodium hydride / tetrahydrofuran; paraffin oil (nujol) / 0.17 h / 0 °C 3.2: 12 h / 20 °C 4.1: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme

1.1: sodium hydride / tetrahydrofuran; paraffin oil (nujol) / 0.17 h / 0 °C 1.2: 12 h / 20 °C 2.1: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme