Stabilization by Benzannulation: Butterfly Azaacenes.
Matthias MüllerHilmar ReissOlena TverskoyFrank RomingerJan FreudenbergUwe H F BunzPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2018)
Soluble butterfly-shaped tetraazapentacenes and tetraazaheptacenes were prepared by condensation or Stille coupling with a stannafluorene. The stability of the benzo-winged tetraazaheptacene is dramatically increased through the fourfold benzannulation, yet its acene character is retained to a significant extent.
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