G. Mehta et al., SHORT SYNTHETIC APPROACH TOWARDS THE TRIINDENOTRIPHENYLENE (HEMIFULLERENE) SYSTEM, Journal of the Chemical Society. Perkin transactions. I, (20), 1995, pp. 2529-2530
A two-step synthesis of trimethyltribenzotriphenylene 2 from readily a
vailable starting materials involving three-fold Wittig reaction and t
hree-fold oxidative photocyclization along a C-3-symmetry path is repo
rted. Flash vacuum pyrolysis of 2 in the quest for the triindenotriphe
nylene (hemifullerene) system has so far led only to the formation of
mono-coupled products 6 and 7.