1: thiophene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in tetrahydrofuran; hexane T=20°C; 2 h; 2: With zinc(II) chloride in tetrahydrofuran; hexane 1 h; Heating; 3: 1-bromo-4-ethenylbenzene With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran 15 h; Heating;

tetrakis(triphenylphosphine) palladium(0) in N,N-dimethyl-formamide T=90°C; Stille reaction;