Diels–Alder reaction of [60]fullerene with cyclooctatetraene and electrophilic addition to the cycloadduct

[60]Fullerene reacted with cyclooctatetraene as a dienic partner in the Diels–Alder reaction to give the 1:1 cycloadduct in satisfactory yield (51%), which was attained by heating at relatively low temperature (110°C) and for an extended period (2 days). The cycloadduct underwent electrophilic addition reactions in a manner somewhat different from the usual reactions.