An effective one-stage method is proposed for obtaining symmetrical dicarbazole-biphenyls, components of phosphorescent organic light-emitting diodes through organocuprates of the corresponding N-(bromophenyl) carbazoles. The reaction products were obtained in moderate to high yields.
[Smith, Catherine J.; Tsang, Melanie W.S.; Holmes, Andrew B.; Danheiser, Rick L.; Tester, Jefferson W. Organic and Biomolecular Chemistry, 2005 , vol. 3, # 20 p. 3767 - 3781]