1: 2-(N,N-diphenylamino)thiophene With n-butyllithium in tetrahydrofuran; hexane T=-70 - 20°C; 2: With tributyltin chloride in tetrahydrofuran; hexane 3: thien-2-yl bromide With tetrakis(triphenylphosphine) palladium(0) in toluene T=80°C; 8 h;

tetrakis(triphenylphosphine) palladium(0) in N,N-dimethyl-formamide T=80°C; 8 h;