1: 4-biphenylylacetylene With n-butyllithium in diethyl ether; hexane T=-78 - 20°C; 2: With zinc(II) chloride in tetrahydrofuran; diethyl ether; hexane T=20°C; 2 h; 3: 1-bromo-4-(1,1-dimethylethyl)benzene With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=75°C; Negishi coupling; 20 h;

copper(l) iodide; caesium carbonate in 1-methyl-pyrrolidin-2-one T=195°C; 2 h; microwave irradiation;