1: dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine; palladium diacetate; sodium carbonate / 1,4-dioxane; water / 48 h / Reflux 2: ethylenediamine / 1,4-dioxane; propan-1-ol; water / 24 h / Reflux View Scheme

1: potassium acetate / tert-butyl alcohol / 2 h / 90 °C / Inert atmosphere 2: potassium phosphate / tert-butyl alcohol / 2 h / 90 °C / Inert atmosphere View Scheme

potassium acetate in tert-butyl alcohol T=90°C; 2 h; Inert atmosphere;