1: alpha-Terthiophene With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: chloro-diphenylphosphine in tetrahydrofuran; hexane T=25°C; 0.5 h; Further stages.;

1: 5-bromo-lt;2,2',5',2''gt;-terthiophene With magnesium; ethylene dibromide in tetrahydrofuran T=20°C; 1 h; sonication; 2: chloro-diphenylphosphine in diethyl ether; hexane T=20°C; 1 h; Further stages.;