Novel dihydropyrazines and their double ortho-annulation to hexaazapentacenes

DOI: 10.5560/ZNB.2014-4002

Source and publish data:

Zeitschrift fur Naturforschung, B: Chemical Sciences p. 641 - 649 (2014)

Update date:2022-08-04

Topics:

Authors:

Strathausen, Rainer

Beckert, Rainer

Fleischhauer, Jan

Mueller, Dirk

Goerls, Helmar

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Article abstract of DOI:10.5560/ZNB.2014-4002

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.

Full text of DOI:10.5560/ZNB.2014-4002

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