trifluoroacetic acid; cobalt(II) dibromide; zinc dibromide in acetonitrile the mixt. in CH3CN was stirred at room temp., then thienylbromide was added, stirred at room temp.; GC analysis;

in tetrahydrofuran T=20°C; 1 h;

tetra-n-butylammonium tetrafluoroborate; NiBr2bipy in N,N-dimethyl-formamide Electrochem. Process; at 263 K with Zn anode and Ni foam cathode; supporting electrolite tetrabutylammonium tetrafluoroborate, 1.5-3 mA/cm-2 constant current density;

copper(l) iodide; lithium chloride in tetrahydrofuran T=20°C; 2 h; Inert atmosphere;