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Synfacts 2008(9): 0935-0935  
DOI: 10.1055/s-2008-1078676
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart ˙ New York

Donor-Acceptor Quateraryls: A Solution for the OLED Blues

Contributor(s): Timothy M. Swager, Rebecca R. Parkhurst
A. Goel*, M. Dixit, S. Chaurasia, A. Kumar, R. Raghunandan, P. R. Maulik, R. S. Anand
Central Drug Research Institute, Lucknow and Indian Institute of Technology, Kanpur, India
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Publication History

Publication Date:
22 August 2008 (online)

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Significance

The authors report the design and synthesis of a series of quateraryl blue emittors containing amine donor and cyano acceptor moieties. Their method serves as an improvement over previous polyaryl-substituted benzene syntheses that require iterative coupling reactions on sterically crowded substrates. The proposed mechanism of the final and key step involves Michael addition of the conjugate base of 5 to 4, followed by intramolecular cyclization, decarboxylation and dehydration. The analogues of 6 were used in the fabrication of multilayer light-emitting diodes.