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

1: diethyl ether / 12 h / 20 °C / Cooling with ice 2: dipyridinium dichromate / N,N-dimethyl-formamide / 12 h / 20 °C 3: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 4: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / dichloromethane; 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme

1: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 2: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / dichloromethane; 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme

1: dipyridinium dichromate / N,N-dimethyl-formamide / 12 h / 20 °C 2: hydrazine hydrate / ethylene glycol / 12 h / 165 °C 3: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct / dichloromethane; 1,4-dioxane / 12.5 h / 80 °C / Inert atmosphere View Scheme