Asymmetric [3+2] cycloaddition of chiral ferrocenyl substituted azomethine ylides to C60 leads to the corresponding fulleropyrrolidines with high diastereoselectivities. This methodology has been applied to the preparation of a C2-symmetric enantiopure fullerene dimer.
Mamane, V., & Riant, O. (2001). Asymmetric Synthesis of Chiral Ferrocenyl Fulleropyrrolidines as Potential Building Blocks for New Materials. Tetrahedron, 57(13), 2555-2561. https://doi.org/10.1016/S0040-4020(01)00066-7 (Original work published 2001)