1: With 2,2,6,6-tetramethylpiperidin-4-yl heptanoate; 2,2,6,6-tetramethyl-piperidine; n-butyllithium; ZnCl2*TMEDA in tetrahydrofuran; hexane T=0 - 20°C; Inert atmosphere; 2: With iodine in tetrahydrofuran; hexane Inert atmosphere;

1: With 2,2,6,6-tetramethyl-piperidine; n-butyllithium; N,N,N',N,-tetramethylethylenediamine; zinc(II) chloride in tetrahydrofuran; hexane T=25°C; 2.5 h; 2: With iodine in tetrahydrofuran; hexane Further stages.;

1: With 1-tert-butyl-4,4,4-tris(dimethylamino)-2,2-bis[tris(dimethylamino)-phosphoranylidenamino]-2Λ54Λ5-catenadi(phosphazene); zinc(II) iodide in tetrahydrofuran T=-78 - 20°C; 1 h; 2: With iodine in tetrahydrofuran

in acetonitrile Irradiation;

in acetonitrile Irradiation;

in acetonitrile Irradiation;