Found at the core of many discotic liquid crystals, triphenylenes can now be synthesized efficiently by the palladium-catalyzed trimerization of arynes, including those containing donor and acceptor substituents [Eq. (a); R=OMe, F].
Von reaktiven Zwischenstufen zu nützlichen Produkten gelangt man durch die Palladium‐katalysierte Trimerisierung intermediär gebildeter 1,2‐Didehydrobenzole, die auch Donor‐ oder Acceptor‐substituiert sein können [Gl. (a); R=OMe bzw. F]. Die dabei unter milden Bedingungen erhaltenen Triphenylene sind die zentrale Struktureinheit vieler Verbindungen, die discotische Flüssigkristalle bilden.
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