1,1'-bis-(diphenylphosphino)ferrocene; palladium diacetate in methanol T=20°C; Suzuki-Miyaura cross- coupling; Inert atmosphere;

1: furan With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in tetrahydrofuran; hexane 0.5 h; Heating; 2: With tellurium in tetrahydrofuran; hexane T=2°C; 3: n-butyllithium in tetrahydrofuran; hexane T=20°C; 6 h;

1,1'-bis-(diphenylphosphino)ferrocene; palladium diacetate; silver(l) oxide in methanol T=20°C; Suzuki-Miyaura cross- coupling; 2 h; Inert atmosphere;