potassium hydroxide in methanol 3 h; Ambient temperature;

1: 85 percent / bis<triphenylphosphine>palladium dichloride, copper(I) iodide, triethylamine / 12 h / 40 °C 2: 71 percent / aq. KOH / methanol / 3 h / Ambient temperature View Scheme

1: 89 percent / bis<triphenylphosphine>palladium dichloride, copper(I) iodide, triethylamine / 48 h / 70 °C 2: 71 percent / aq. KOH / methanol / 3 h / Ambient temperature View Scheme

sulfuric acid; water; mercuric sulphate in acetone 2 h; Heating;