1,1'-bis-(diphenylphosphino)ferrocene; formic acid; palladium diacetate; triethylamine in N,N-dimethyl-formamide T=80°C; 1 h; Inert atmosphere;

2,6-di-tert-butyl-4-methyl-phenol; tris-(o-tolyl)phosphine; lithium chloride; bis-triphenylphosphine-palladium(II) chloride; copper(I) bromide in N,N-dimethyl-formamide Heating;