potassium hydroxide in methanol 1 h; Ambient temperature;

1: 78 percent / bis<triphenylphosphine>palladium dichloride, copper(I) iodide, triethylamine / 6 h / 100 °C 2: 64 percent / aq. KOH / methanol / 1 h / Ambient temperature View Scheme

2: potassium carbonate; methanol View Scheme

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