Retro‐cycloaddition of easily prepared pyrrolidinofullerenes affords quantitatively pristine fullerenes, and thus can be used as a new protection‐deprotection protocol in the chemistry of fullerenes, as shown in the cover picture. In their Communication on page 110 ff., N. Martín, L. Echegoyen, and co‐workers report on this promising finding, which has already allowed the selective isolation of the I h constitutional isomer of Sc 3 N@C 80 .
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Martı́n et al. (2005) studied this question.