At the crossroads: A unique carbon-bridged annulene motif--dehydroquatyrin--is imprinted into the molecular structure of the tetraazuliporphyrin tetracation (see picture). The macrocycle, which lies at the intersection of annulene, carbocation, and porphyrin chemistry, is obtained by the standard condensation of azulene and arylaldehyde followed by oxidation. The meso positions of the tetracation are susceptible to anionic or weak nucleophilic attack.
Am Scheideweg: Ein einzigartiges kohlenstoffüberbrücktes Annulenmotiv – das Dehydroquatyrin – ist Teil der Molekülstruktur des Tetraazuliporphyrintetrakations (siehe Bild). Der Makrocyclus, der sich an der Schnittstelle zwischen Annulen‐, Carbokationen‐ und Porphyrinchemie befindet, wird durch Kondensation von Azulen mit Arylaldehyden und nachfolgende Oxidation erhalten. Die meso‐Positionen des Tetrakations können durch Anionen oder Nucleophile angegriffen werden.magnified image
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