Fullerene was easily converted to its derivatives by the treatment wit
h benzocyclobutene homologs for 20 h at 140 degrees C. The spectroscop
ic analyses clearly indicate mono-[4 + 2]-cycloadduct structures of it
s derivatives. Isolated yields of mono- and diadducts were from 4.4 to
15.6% and from 8.1 to 5.3%, respectively.