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Synthesis of Di- and tetra-substituted 1,4,5,8-tetra-azaphenanthrenes (pyrazino[2,3-f]quinoxalines)

par Hinkens, Raymonde ;Vamos, Mária
Référence Journal of the Chemical Society. Perkin Transactions 1, 13, page (1229)
Publication Publié, 1975

Article révisé par les pairs

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Résumé :

6-Nitroquinoxalines (I) are aminated by hydroxylamine to 5-amino-6-nitroquinoxalines (II). These are reduced to 5,6-diaminoquinoxalines (III) which condense with appropriate α-dicarbonyl compounds to yield substituted 1,4,5,8-tetra-azaphenanthrenes (IV).