Papers

International journal
Apr 26, 2013

Synthesis of 2-azulenyl-1,1,4,4-tetracyano-3-ferrocenyl-1,3-butadienes by [2+2] cycloaddition of (ferrocenylethynyl)azulenes with tetracyanoethylene.

Chemistry (Weinheim an der Bergstrasse, Germany)
  • Taku Shoji
  • ,
  • Shunji Ito
  • ,
  • Tetsuo Okujima
  • ,
  • Noboru Morita

Volume
19
Number
18
First page
5721
Last page
30
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1002/chem.201202257

1-, 2-, and 6-(Ferrocenylethynyl)azulene derivatives 10-16 have been prepared by palladium-catalyzed alkynylation of ethynylferrocene with the corresponding haloazulenes under Sonogashira-Hagihara conditions. Compounds 10-16 reacted with tetracyanoethylene (TCNE) in a [2+2] cycloaddition-cycloreversion reaction to afford the corresponding 2-azulenyl-1,1,4,4,-tetracyano-3-ferrocenyl-1,3-butadiene chromophores 17-23 in excellent yields. The redox behavior of the novel azulene chromophores 17-23 was examined by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which revealed their multistep electrochemical reduction properties. Moreover, a significant color change was observed by visible spectroscopy under electrochemical reduction conditions.

Link information
DOI
https://doi.org/10.1002/chem.201202257
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/23447514
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84876940685&origin=inward
ID information
  • DOI : 10.1002/chem.201202257
  • ISSN : 0947-6539
  • Pubmed ID : 23447514
  • SCOPUS ID : 84876940685

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