Regioconvergent Synthesis of a π‑Extended Tribenzotriquinacene-Based Wizard Hat-Shaped Nanographene

The
successful enlargement of the curved π-electron periphery
of the wizard hat-shaped polycyclic aromatic compound 1 is described. The target structure 2 features an m,m,p,m,m,p,m,m,p-nonaphenylene belt fused to a central
tribenzotriquinacene unit. The synthesis involves a multiple regioconvergent
Scholl-type dehydrocyclization as the key step. Spectroscopic, structural,
and electronic properties of the title compound 2 are
reported.