2-Aryl and 2-Heteroaryl Pyrrolo[2,3-b]quinoxalines via Copper-Catalyzed Reaction of 1-Alkynes with 2-Bromo-3-trifluoroacetamidoquinoxaline - Cacchi, Sandro; Fabrizi, Giancarlo; Parisi, Luca M; Bernini, Roberta (Synlett, 2004)