With mechanistic knowledge of the second C-C bondforming step established, the substrate scope of the process was investigated (Scheme 3). The reaction conditions formed 7H-pyrido [3,4-c]carbazole analogues (9a-c). The presence of a nitro group resulted in only trace amounts of 9d formed, with the secondary aniline (7e) isolated in 79% yield. The reaction conditions also tolerated changes in the substituents in the D-ring of the heteroaryl bromide (9e-j). The [3+2]heteroannulation strategy was also compatible with the formation of carbazole-1,4-quinones (21a-f). Access to N-arylated products is also possible, forming a mixture of fused imidazoles (9k-l) via an N-arylation step, alongside tertiary anilines (22-23).