1: potassium carbonate / water; dichloromethane 2: caesium carbonate; bis(dibenzylideneacetone)-palladium(0); di-tert-butyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine / 1,4-dioxane / 24 h / |Inert atmosphere; |Sealed tube; |Reflux View Scheme