1: caesium carbonate; tris-(dibenzylideneacetone)dipalladium(0); trifuran-2-yl-phosphane / 1,4-dioxane; water / 65 °C / |Inert atmosphere 2: bis-triphenylphosphine-palladium(II) chloride; sodium tetrahydroborate; N,N,N',N,-tetramethylethylenediamine / tetrahydrofuran / 24 h / 25 °C / |Inert atmosphere View Scheme

1: caesium carbonate; tris-(dibenzylideneacetone)dipalladium(0); trifuran-2-yl-phosphane / 1,4-dioxane; water / 65 °C / |Inert atmosphere 2: bis-triphenylphosphine-palladium(II) chloride; sodium tetrahydroborate; N,N,N',N,-tetramethylethylenediamine / tetrahydrofuran / 24 h / 25 °C / |Inert atmosphere View Scheme

1: lt;(E)-4,4-dibromobuta-1,3-dien-1-ylgt;benzene With n-butyllithium in tetrahydrofuran; hexane T=-78 - 20°C; 2.16667 h; 2: methyl iodide in tetrahydrofuran; hexane T=-78 - 20°C;

1: benzene 2: H2O / benzene / 0.5 h View Scheme