title: Formation of linear tetramers of diarylalkynes by the Zr/Cr system.
abstract: 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.
authors.affiliation: Catalysis Research Center and Graduate School of Pharmaceutical Sciences, Hokkaido University and SORST, Japan Science and Technology Agency (JST), Sapporo 001-0021, Japan. tamotsu@cat.hokudai.ac.jp
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Takahashi
authors.forename: Yuanhong
authors.initials: Y
authors.lastname: Liu
authors.forename: Atsushi
authors.initials: A
authors.lastname: Iesato
authors.forename: Shinji
authors.initials: S
authors.lastname: Chaki
authors.forename: Kiyohiko
authors.initials: K
authors.lastname: Nakajima
authors.forename: Ken-ichiro
authors.initials: K
authors.lastname: Kanno