1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; potassium acetate / 1,4-dioxane / 18 h / 100 °C / |Inert atmosphere 2: tris(dibenzylideneacetone)dipalladium(0) chloroform complex; tripotassium phosphate monohydrate; [(t-Bu)3PH]BF4 / 1,4-dioxane; water / 1.5 h / 85 °C / |Inert atmosphere 3: hydrogenchloride / water; ethanol / 5 h / 85 °C / |Inert atmosphere 4: HATU; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 4.5 h / 20 °C / |Cooling with ice View Scheme