This Account describes new reactions that have been developed in the Johnson laboratories at UNC Chapel Hill enabled by considerations of N–O bond cleavage. Three main case studies are highlighted: the metal-catalyzed electrophilic amination of O-acyl hydroxyl amines, multihetero-Cope rearrangements driven by O–N bond breakage, and merged dearomatization/N=O cycloadditions for the synthesis of complex 4-aminocyclohexanols such as those found in the natural product tetrodotoxin.1 Introduction2 Electrophilic Amination3 Multihetero-Cope Rearrangements4 Progress toward a Total Synthesis of (–)-Tetrodotoxin5 Conclusion