C12H13CoO5 in N,N-dimethyl-formamide T=200°C; 0.333333 h; Microwave irradiation;

1: phenyleneoxyethylene With cyclopentadienylbis(ethene)cobalt in tetrahydrofuran T=20°C; 4 h; Inert atmosphere; 2: 1,8-di-(phenyl)octa-1,7-diyne in tetrahydrofuran T=-40 - 20°C; Inert atmosphere; 3: With FeCl3·6H2O in acetonitrile T=20°C; Inert atmosphere; regioselective reaction;

copper dichloride; palladium dichloride in 1,2-dichloro-ethane T=80°C; 37 h; Title compound not separated from byproducts.;