in dimethyl sulfoxide T=10°C; 0.333333 h;

triethylamine in acetonitrile T=0°C; 0.5 h;

1.1: palladium diacetate; caesium carbonate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene / 1,4-dioxane / 15 h / 110 °C / Inert atmosphere 2.1: hydrogenchloride / 1,4-dioxane / 0.25 h / 20 °C / Inert atmosphere 2.2: Inert atmosphere View Scheme