1: hydrogen iodide / water / 1 h / |Reflux; |Darkness 2: sodium lauryl sulfate; sodium hydrogencarbonate / water / |Reflux 3: CuCl2·2H2O; oxygen / 10 h / |Reflux 4: hydrogen bromide / water; 1,4-dioxane View Scheme

1: sodium lauryl sulfate; sodium hydrogencarbonate / water / |Reflux 2: CuCl2·2H2O; oxygen / 10 h / |Reflux 3: hydrogen bromide / water; 1,4-dioxane View Scheme

in ethyl acetate

1: CuCl2·2H2O; oxygen / 10 h / |Reflux 2: hydrogen bromide / water; 1,4-dioxane View Scheme