1: palladium diacetate; triphenylphosphine; N,N,N',N,-tetramethylethylenediamine; sodium tetrahydroborate / tetrahydrofuran / 9 h / 20 °C / |Inert atmosphere 2: N,N,N',N,-tetramethylethylenediamine; sodium tetrahydroborate; PdCl2(1,1′-bis(di-tertbutylphosphino)ferrocene) / tetrahydrofuran / 20 h / 65 °C / |Inert atmosphere View Scheme