Phenyl-substituted tetra-, penta-, hexa- and octacenes were easily obtained starting from a readily available naphthalene-based bisaryne precursor. This approach to large acenes involves a sequence of two Diels–Alder cycloadditions with dienones followed by two CO extrusion reactions.
D. Rodríguez-Lojo, D. Pérez, D. Peña and E. Guitián, Chem. Commun., 2015, 51, 5418 DOI: 10.1039/C5CC00205B
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