1: N-ethyl-N,N-diisopropylamine; pyridine / 4-(N,N-dimethlyamino)pyridine / 1 h / 0 - 20 °C 2: triethylammonium formate / palladium diacetate; 1,1'-bis-(diphenylphosphino)ferrocene / N,N-dimethyl-formamide / 8 h / 50 °C / Inert atmosphere 3: triphenylphosphine / tetrahydrofuran View Scheme

1: 4-(N,N-dimethlyamino)pyridine; N-ethyl-N,N-diisopropylamine / pyridine / 1 h / 0 - 20 °C 2: triethylammonium formate; 1,1'-bis(diphenylphosphino)ferrocene / palladium diacetate / N,N-dimethyl-formamide / 8 h / 50 °C / Inert atmosphere 3: triphenylphosphine / tetrahydrofuran / 20 °C View Scheme