1: diethyl ether / 20 °C 2: bis(dibenzylideneacetone)-palladium(0); bis[2-(diphenylphosphino)phenyl] ether; potassium tert-butylate / toluene / 100 °C / |Schlenk technique; |Inert atmosphere View Scheme

1.1: tetrakis(triphenylphosphine) palladium(0) / ethylene glycol dimethyl ether / Inert atmosphere 1.2: 11 h / Reflux 2.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / bis-triphenylphosphine-palladium(II) chloride / N,N-dimethyl-formamide / 140 °C / Inert atmosphere View Scheme