1: 1,8-di-(phenyl)octa-1,7-diyne With n-butyllithium; zirconocene dichloride in tetrahydrofuran; hexane T=20°C; 12 h; 2: dibromophenylphosphorane in tetrahydrofuran; hexane T=20°C; 2 h; Further stages.;

1: 1,8-di-(phenyl)octa-1,7-diyne With n-butyllithium; zirconocene dichloride in tetrahydrofuran; hexane T=20°C; 12 h; 2: phenylphosphonous dichloride in tetrahydrofuran; hexane T=20°C; 2 h; Further stages.;