1: N-(2-ethylhexyl)-2,7-diiodocarbazole With n-butyllithium in tetrahydrofuran; hexane T=-78 - 0°C; 2: 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in tetrahydrofuran; hexane T=-78 - 20°C; Further stages.;