silver nitrate; 1,8-diazabicyclo[5.4.0]undec-7-ene in dimethyl sulfoxide T=60°C; P=750.075 Torr; 24 h; Schlenk technique;

1: triethylamine; bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide / tetrahydrofuran / 20 °C / |Inert atmosphere 2: silver nitrate; 1,8-diazabicyclo[5.4.0]undec-7-ene / dimethyl sulfoxide / 24 h / 60 °C / 750.08 Torr / |Schlenk technique View Scheme

1) 250 deg C, 3 h, 2) 350 deg C, 30 min;