1: sodium hydride / dichloromethane / 2 h / 0 °C / |Inert atmosphere 2: potassium hydroxide / ethanol; water / 12 h / 0 - 20 °C / |Inert atmosphere 3: caesium carbonate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride / N,N-dimethyl-formamide / 2 h / 70 °C / |Inert atmosphere; |Microwave irradiation 4: hydrogenchloride; methanol / water / 6 h / |Inert atmosphere View Scheme

1: 0.8 g / K2CO3, KI / acetone / 20 h / Heating 2: 0.4 g / N,N-dimethylaniline / 6 h / 100 - 120 °C View Scheme

1: 0.2 g / BF3.Et2O / dioxane / 1 h / 35 - 40 °C 2: 0.5 g / Zn/cc. HCl / ethanol / 0.5 h / Heating View Scheme

phosphoric acid in xylene

1: sodium hydride / dichloromethane / 2 h / 0 °C / |Inert atmosphere 2: potassium hydroxide / ethanol; water / 12 h / 0 - 20 °C / |Inert atmosphere 3: caesium carbonate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride / N,N-dimethyl-formamide / 2 h / 70 °C / |Inert atmosphere; |Microwave irradiation 4: hydrogenchloride; methanol / water / 6 h / |Inert atmosphere View Scheme