Regio- and diastereo-controlled double cycloaddition to [60] fullerene: one-step synthesis of Cs and C2 chiral organofullerenes with new tris-annulating reagents

Double cycloaddition of new tris-annulation reagents to [60]fullerene creates a tricyclic system constructed on the [60]fullerene sphere, providing Cs symmetric and C2 chiral non-racemic organofullerenes.