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 reaction with nitriles and isocyanates.
Takahashi
Tamotsu
T
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
Liu
Yuanhong
Y
Iesato
Atsushi
A
Chaki
Shinji
S
Nakajima
Kiyohiko
K
Kanno
Ken-ichiro
K