bis-triphenylphosphine-palladium(II) chloride; 2,6-di-tert-butyl-4-methyl-phenol; lithium chloride in N,N-dimethyl-formamide T=90°C; 18 h; Inert atmosphere;

hydrogenchloride; zinc; NiBr2(PPh3)2; triphenylphosphine in acetonitrile T=60°C; 6 h;