triethylamine; triphenylphosphine; bis(dibenzylideneacetone)-palladium(0) in 1,4-dioxane T=80°C; Inert atmosphereSealed chamber;

1: hydrogenchloride; iron / ethanol; water / 3 h / Reflux 2: TMADCl / ethyl acetate / 96 h 3: triethylamine; triphenylphosphine; bis(dibenzylideneacetone)-palladium(0) / 1,4-dioxane / 80 °C / Inert atmosphere; Sealed chamber View Scheme

1: TMADCl / ethyl acetate / 96 h 2: triethylamine; triphenylphosphine; bis(dibenzylideneacetone)-palladium(0) / 1,4-dioxane / 80 °C / Inert atmosphere; Sealed chamber View Scheme

1.1: sulfuric acid; acetic acid; sodium nitrite / water / 15 - 20 °C 1.2: 20 - 80 °C 2.1: hydrogenchloride; iron / ethanol; water / 3 h / Reflux 3.1: TMADCl / ethyl acetate / 96 h 4.1: triethylamine; triphenylphosphine; bis(dibenzylideneacetone)-palladium(0) / 1,4-dioxane / 80 °C / Inert atmosphere; Sealed chamber View Scheme