1: 3,6-dibromo-9-(naphthalen-1-yl)-9H-carbazole With tert.-butyl lithium in tetrahydrofuran; pentane Inert atmosphereCooling with acetone-dry ice; 2: N,N-dimethyl-formamide in tetrahydrofuran; pentane 2 h; Inert atmosphereCooling with acetone-dry ice; 3: With hydrogenchloride; water in tetrahydrofuran; pentane T=20°C;