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Novel Dihydropyrazines and their Double ortho-Annulation to Hexaazapentacenes
-
Rainer Strathausen
,
Jan Fleischhauer
Published/Copyright:
June 2, 2014
The cycloacylation of oxalic amidines 7 with bis-imidoylchlorides 6 furnished the dihydropyrazine derivatives 8. Due to their vicinal amino-imino substructures, they provide good preconditions for a double intramolecular ring closure reaction. An alternative synthesis for hexaaza-pentacenes 1 was developed using potassium carbonate as the base and lead tetraacetate as the oxidizing agent.
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Novel Dihydropyrazines and their Double ortho-Annulation to Hexaazapentacenes
Received: 2014-1-8
Published Online: 2014-6-2
Published in Print: 2014-5-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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Keywords for this article
Hexaazapentacenes;
Dihydropyrazines;
ortho-Annulation;
Amidines;
Fluorophores
Articles in the same Issue
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