Multi-step reaction with 2 steps 1.1: tris-(dibenzylideneacetone)dipalladium(0); 1,1'-bis-(diphenylphosphino)ferrocene / toluene / 0.17 h / 20 °C / Inert atmosphere1.2: 17 h / 110 °C2.1: tris-(dibenzylideneacetone)dipalladium(0); 1,1'-bis-(diphenylphosphino)ferrocene / toluene / 0.17 h / 20 °C / Inert atmosphere2.2: 15 h / 110 °C