We report the isolation and characterization of bis- and tris-adducts of fulleropyrrolidine derivatives.
First, all eight N-methyl regioisomers with two addends on the C60 sphere have been isolated;
second, C60 was used as starting material for the synthesis of tris-adducts, and the products formed
in detectable quantities have been isolated and characterized. Third, the same compounds were
obtained by introducing the third addend on each previously isolated bis-derivative: this approach
facilitated the assignment of the relative geometry through chromatographic comparison of the
diverse reaction mixtures. Finally, the obtained tris-adducts have been characterized by means of
ES-MS, UV-vis, 1H NMR, as well as comparison with UV spectra and elution order of Bingel and
Diels-Alder tris-adducts described in the literature.
