Azide focal point

Similarly, treatment of C60 in refluxing dry chlorobenzene with dendrimer 57 possessing an azide focal point, prepared from the corresponding bromide (52) with sodium azide in DMSO, gave rise (69%) to a controlled, one-step cycloaddition affording the amine substituted fullerene 58, 1531... 

Lee, J.W., Kim, J.H., and Kim, B.K. (2006b) Synthesis of azide-functionalized PAMAM dendrons at the focal point and their application for synthesis of PAMAM-like dendrimers. Tetrahedron Letters, 47,2683. 

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