1.1: n-BuLi / tetrahydrofuran / 0.5 h / 0 °C 1.2: tetrahydrofuran / 4 h / 20 °C 2.1: Bu4NF / tetrahydrofuran / 8 h / 26 °C View Scheme

1.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide / 8 h / 50 °C / |Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 2.2: 1 h / 0 °C / |Inert atmosphere 3.1: potassium carbonate / methanol / 1 h / 25 °C / |Inert atmosphere View Scheme