Three-Fold Scholl-Type Cycloheptatriene Ring Formation around a Tribenzotriquinacene Core: Toward Warped Graphenes
An unprecedented 3-fold Scholl-type cycloheptatriene ring formation around a tribenzotriquinacene core is realized, producing a polyaromatic arene with a wizard hat-shaped structure.
The presence of three 3,4-dimethoxyphenyl rings at the C-1, C-4 and C-8 positions of the tribenzotriquinacene skeleton is crucial to the success of this transformation.
H.-W. Ip, C.-F. Ng, H.-F. Chow and D. Kuck, J. Am. Chem. Soc. 2016, 138, 13778–13781.