Cu‐Catalyzed Sequential C—N Bond Formations: Expeditious Synthesis of Tetracyclic Indoloindol‐3‐ones.

The tetracyclic indoloindol-3-one core has been forged from easily accessible 2,2′-bis-bromochalcones employing a reaction cascade comprising Cu-catalyzed SNAr with azide; nitrene C–H insertion and intramolecular Ullmann reaction with all three C–N bond formations in one-go.