Isolation of 6,13-dipropylpentacene and its tautomerization.
6,13-Dipropyl-5,14-dihydropentacene was aromatized by the combination of the formation of pentacene-DDQ adduct and abstraction of DDQ from the pentacene-DDQ adduct with 50 equiv of gamma-terpinene to give 6,13-dipropylpentacene cleanly. It was stable and isolable. In the presence of a catalytic amount of acid, 6,13-dipropylpentacene was isomerized to its tautomer.
Takahashi
Tamotsu
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Catalysis Research Center and Graduate School of Life Science, Hokkaido University, and SORST, Japan. tamotsu@cat.hokudai.ac.jp
Kashima
Ken
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Li
Shi
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Nakajima
Kiyohiko
K
Kanno
Ken-ichiro
K