Structural and chemical properties of 3,10-diaza-N,N- dimethyldispiro[5.0.5.3]-pentadeca-1,4,8,11-tetraene: A novel heterocyclic dispiro compound

Journal of Organic Chemistry

Volumn 64, Issue 19, 1999, Pages 7249-7253

  Muramatsu, Takashi ^a   Toyota, Azumao ^b   Kudou, Mikako ^a   Ikegami, Yusaku ^c   Watanabe, Masataka ^d  

^a MIYAGI UNIVERSITY OF EDUCATION   (Japan)

^b YAMAGATA UNIVERSITY   (Japan)

^c Japan Association of Chemistry   (Japan)

^d TOHOKU UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

3,10 DIAZA N,N DIMETHYLDISPIRO[5.0.5.3]PENTADECA 1,4,8,11 TETRAENE; HETEROCYCLIC COMPOUND; UNCLASSIFIED DRUG;

ARTICLE; CHEMICAL ANALYSIS; CHEMICAL STRUCTURE; MOLECULAR INTERACTION; MOLECULAR MODEL; REACTION ANALYSIS; STRUCTURE ANALYSIS; THERMOSTABILITY;

EID: 0033578946     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo990514k     Document Type: Article

References (16)

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7. 1H NMR signals attributed to the decomposition compounds are very low in intensity, overlapped with those of 6-8, no clear assignments were made for them. Because of the appearance of signals attributable to pyridine ring structures at lower fields of δ 8.57 (d) and 6.69 (d), however, the decomposition compounds may be assigned as pyridine derivatives produced by demethylation of 7 and 8.
8. 1H NMR spectrum arising from products involved in the secondspot exhibits many broad signals over the wide range of chemical shifts (δ 1-8 ppm), but no clear assignments were made for the products. This is because the individual components could not be efficiently isolated in our experimental condition. However, since a broad absorption spectrum is observed around 610 nm, one of the products may be characterized as a species possessing a ring-opened structure with a relatively long conjugated skeleton.
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