1: palladium diacetate; boron trifluoride diethyl etherate; tert.-butylhydroperoxide; water / dimethyl sulfoxide; 1,4-dioxane / 130 °C 2: hydrogenchloride; water / dimethyl sulfoxide; 1,4-dioxane / 6 h / 100 °C View Scheme

1: palladium diacetate; boron trifluoride diethyl etherate; tert.-butylhydroperoxide; water / dimethyl sulfoxide; 1,4-dioxane / 130 °C 2: copper(I) oxide; 1,10-phenanthroline / 1-methyl-pyrrolidin-2-one; water / 0.5 h / 170 °C View Scheme