Volume 58, Issue 33 pp. 11379-11384
Communication

Introducing Perylene as a New Member to the Azaborine Family

Tanja Kaehler

Tanja Kaehler

Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany

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Dr. Michael Bolte

Dr. Michael Bolte

Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany

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Dr. Hans-Wolfram Lerner

Dr. Hans-Wolfram Lerner

Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany

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Prof. Dr. Matthias Wagner

Corresponding Author

Prof. Dr. Matthias Wagner

Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany

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First published: 29 May 2019
Citations: 88

Graphical Abstract

BN/CC isosterism: Doubly BO- and BN-doped perylenes have been prepared, which further expand the chemical space of a ubiquitous building block for organic electronic materials. The key cyclization step proceeds via a quantitative Wacker-type addition reaction of BO−H or BN−H bonds to adjacent alkynyl moieties.

Abstract

Substitutional doping of perylene with two boron atoms at the 6b/12b positions and two oxygen or nitrogen atoms at the 1/7 positions has been achieved. The modular synthesis route developed for these bis-BO- (3) and bis-BN-perylenes (5) starts from the readily accessible borinic acid derivative of the doubly brominated 9,10-dihydro-9,10-diboraanthracene (DBA), 1,5-Br2DBA(OH)2. A Stille-type reaction first furnishes the alkynyl-substituted species 1,5-(RCC)2DBA(OH)2 (2), which undergo double ring closure to afford 3 via the gold-catalyzed addition of the O−H bonds to the C≡C bonds. Treatment of 2 with MeN(SiMe3)2 leads to aminoborane intermediates 1,5-(RCC)2DBA(N(H)Me)2, which can be ring-closed to give 5 in a similar manner as in the case of 3. Different substituents R (such as Me, tBuPh) can be introduced at the 2/8 positions of the perylene core. The products obtained undergo reversible reduction and are efficient blue/turquoise emitters.

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