Formation of Linear Tetramers of Diarylalkynes by the Zr/Cr System

The reaction of diarylalkynes with Cp2ZrBu2 and successive treatment with CrCl3 afforded linear tetramers of diarylalkynes, (1E,3E,5E,7E)-octatetraenes. On the other hand, dialkylalkynes did not give the corresponding octatetraenes but cyclized products, such as pyridines and pyridones, by the react...

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Published inJournal of the American Chemical Society Vol. 127; no. 34; pp. 11928 - 11929
Main Authors Takahashi, Tamotsu, Liu, Yuanhong, Iesato, Atsushi, Chaki, Shinji, Nakajima, Kiyohiko, Kanno, Ken-ichiro
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 31.08.2005
Amer Chemical Soc
Subjects
Chemistry
Chemistry, Multidisciplinary
Exact sciences and technology
Kinetics and mechanisms
Organic chemistry
Physical Sciences
Reactivity and mechanisms
Science & Technology
METAL-PROMOTED CYCLIZATION
ZIRCONACYCLOPENTADIENES
HETEROCYCLES
ZIRCONIUM
2 DIFFERENT ALKYNES
PYRIDINES
OLIGOMERIZATION
SELECTIVE FORMATION
DERIVATIVES
ENYNES
Mixed catalyst
Catalytic reaction
Oligomerization
Chromium chloride
Transition metal Compounds
Reaction mechanism
Zirconium Organic compounds
Transition metal Complexes
Complex catalyst
Experimental study
Catalyst activity
Alkyne
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Summary:The reaction of diarylalkynes with Cp2ZrBu2 and successive treatment with CrCl3 afforded linear tetramers of diarylalkynes, (1E,3E,5E,7E)-octatetraenes. On the other hand, dialkylalkynes did not give the corresponding octatetraenes but cyclized products, such as pyridines and pyridones, by the reaction with nitriles and isocyanates.
Bibliography:istex:730BEAA159EE68CE1D0A953BAFE55BA036BB8037
ark:/67375/TPS-9403DKLJ-X
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0002-7863
1520-5126
DOI:10.1021/ja052864w