title: Synthesis and characterization of biphenylene-containing diazaacenes.
abstract: We describe the efficient synthesis of substituted benzo[3,4]cyclobuta[1,2-b]phenazine, benzo[3,4]cyclobuta[1,2]benzo[1,2-i]phenazine, and benzo[3,4]cyclobuta[1,2-b]naphtho[2,3-i]phenazine by a condensation reaction of aromatic diamines with the stable biphenylene-2,3-dione.
authors: Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221-54-8401.
authors: Philipp
authors: P
authors: Biegger
authors: Manuel
authors: M
authors: Schaffroth
authors: Christian
authors: C
authors: Patze
authors: Olena
authors: O
authors: Tverskoy
authors: Frank
authors: F
authors: Rominger
authors: Uwe H F
authors: UH
authors: Bunz
keywords: aromaticity; condensation; cyclobutadiene; diazaacene