Azides heterocyclic synthesis

Dipolar cycloaddition of azides with olefins provides a convenient access to triazolines, cyclic imines, and aziridines and hence is a valuable technique in heterocyclic synthesis. For instance, tricyclic -lactams 273 - 276 have been synthesized using the intramolecular azide-olefin cycloaddition (lAOC) methodology (Scheme 30) [71]. 

Moody, C.J., and Warrellow, G.J., Vinyl azides in heterocyclic synthesis. Part 10. Synthesis of the isoindolobenzazepine alkaloid lennoxamine, J. Chem. Soc., Perkin Trans. 1, 2929, 1990. 

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