1: triethylamine; iodine / 1,4-dioxane / 0.5 h 2: hydrogenchloride / ethanol; water / 2.5 h / |Reflux 3: potassium carbonate; indole; copper(l) iodide; N-methyl-2-(methylamino)ethylamine / dimethyl sulfoxide / 24 h / 100 °C / |Inert atmosphere View Scheme

1: triethylamine; iodine / 1,4-dioxane / 0.5 h 2: hydrogenchloride / ethanol; water / 2.5 h / |Reflux 3: potassium carbonate; 2,2,6,6-tetramethylheptane-3,5-dione; copper(l) iodide / dimethyl sulfoxide / 24 h / 100 °C / |Inert atmosphere View Scheme

Multi-step reaction with 2 steps 1: triethylamine; iodine / 1,4-dioxane / 0.5 h2: hydrogenchloride / ethanol; water / 2.5 h / |Reflux