Synthesis of 2,5,6-Trisubstituted Benzimidazoles by Heck and Subsequent 6π-Electrocyclization-Dehydrogenation Reactions of 2,4,5-Tribromo-N-methylimidazole and 2-Aryl-4,5-dibromo-N-methylimidazoles - Toguem, Serge-Mithérand Tengho; Langer, Peter (Synlett, 2010)