copper(l) iodide; triphenylphosphine; bis-triphenylphosphine-palladium(II) chloride in triethylamine T=89°C;

1: various solvent(s) / 24 h / Ambient temperature 2: 1.) t-BuOK / 1.) triglyme, room temp., 24 h, 2.) 190 deg C, 24 h View Scheme