A new synthetic entry to fused azaquinones by a cycloaddition/ring transformation sequence starting from pyrido[1,2-a]pyrazines

Autor:	Thomas Billert, Helmar Görls, Manfred Döring, Rainer Beckert, Peer Fehling
Rok vydání:	1997
Předmět:	Chemistry Stereochemistry Organic Chemistry Ring (chemistry) Biochemistry Cycloaddition Quinone chemistry.chemical_compound Bipyridine Blue colored Drug Discovery Pyridine Moiety Derivative (chemistry)
Zdroj:	Tetrahedron. 53:5455-5462
ISSN:	0040-4020
DOI:	10.1016/s0040-4020(97)00239-1
Popis:	An expedient one-pot synthesis via a novel cycloaddition/ring transformation sequence allows the introduction of two arylamino groups and a pyridine substructure on azaquinones. Using 1,4-benzoquinone a twofold regioselective reaction yields the deeply blue colored 2,7-diaza-anthraquinones 8, which could be determinated by NMR spectroscopy. In addition, an X-ray structural analysis of the juglone derivative 11 reveals the regioselective arrangement of the bipyridine subunit into the quinone moiety.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3a64a396cdb3e2cfc2327d24faa738cb https://doi.org/10.1016/s0040-4020(97)00239-1 Zobrazit plný text záznamu Full Text from ScienceDirect