N,N,N',N,-tetramethylethylenediamine; cobalt(II) chloride; lithium iodide in tetrahydrofuran T=10°C; 1 h; Inert atmosphere; chemoselective reaction;

tetraethylammonium p-toluenesulfonate in N,N-dimethyl-formamide electroreduction; Zn-cathode, 5.4 F/mol;

oxalic acid T=160°C; und Hydrieren des erhaltenen Olefin-Gemisches an Platin in Essigsaeure;