Lewis Acid Catalyzed Site‐Selective Cycloadditions of 2,6‐Diazasemibullvalenes with Isocyanides, Azides, and Diazo Compounds for the Synthesis of Diaza‐ and Triazabrexadiene Derivatives

Unprecedented cycloaddition pathways: Lewis acid catalyzed cycloadditions of 2,6-diazasemibullvalenes with isocyanides, azides, and diazo compounds lead to structurally interesting and otherwise unavailable cage diaza- and triazabrexadiene derivatives. Unique rearrangement/cycloaddition pathways are revealed.