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Novel double N‐hetero[5]helicenes that are composed of two nitrogen‐substituted heteropentacenes are synthesized by tandem oxidative CN couplings via the cruciform heteropentacene dimers. The developed method is very facile and enables the synthesis of a double helicene in only two steps from commercially available naphthalene derivatives. These double N‐hetero[5]helicenes have larger torsion angles...
Doppelte N‐Hetero[5]helicene, die aus zwei Stickstoff‐substituierten Heteropentacenen bestehen, wurden durch oxidative C‐N‐Tandemkupplungen über die kreuzförmigen Dimere erhalten. In der Zuschrift auf S. 5494 ff. beschreiben D. Sakamaki, S. Seki et al. Synthese, Strukturen und elektronische Eigenschaften dieser neuartigen Verbindungen, die gegen Racemisierung erstaunlich stabil sind.
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