Selective C-H or N-H Imidoylative Annulation of 2-(2-Isocyanophenyl)-1H-indoles Leading to Diverse Indole-fused Scaffolds

2-(2-Isocyanophenyl)-1H-indoles, a class of functionalized isocyanides containing both aromatic C-H and indolo N-H functionalities, are first applied in selective imidoylative annulation reactions. Scaffolds of 6-aryl 11H-indolo[3,2-c]quinoline and 6-aryl indolo[1,2-c]quinazoline, both of which are of biological importance, are obtained selectively through capturing the imidoyl radical or imidoyl palladium intermediates by the C-H and N-H bonds, respectively.