G. Mehta et al., TOWARDS A SYNTHESIS OF C-3-TRIBENZOHEMIFULLERENE, A C42H18 FRAGMENT OF [60]FULLERENE, Journal of the Chemical Society. Perkin transactions. I, (16), 1997, pp. 2269-2271
A short, simple synthesis of C-3-trinaphthotriphenylene 6, C42H24, fro
m readily available precursors involving three-fold Wittig reactions a
nd threefold oxidative photocyclizations is reported; hash vacuum pyro
lysis of 6 in the quest for C-3-tribenzohemifullerene 5, C42H18, has s
o far led only to the formation of monobridged product 12, C42H22.