Ni(PCy3)2Cl2; 1,1,3,3-tetramethyldisiloxane; K3PO4 in toluene T=115°C; 15 h; Inert atmosphere;

1.1: N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium / tetrahydrofuran / 1.25 h / -78 °C / Inert atmosphere 1.2: 2.02 h / -78 - 23 °C / Inert atmosphere 2.1: Ni(PCy3)2Cl2; K3PO4; 1,1,3,3-tetramethyldisiloxane / toluene / 15 h / 125 °C / Inert atmosphere View Scheme