Chemistry Letters p. 179 - 182 (1980)
Update date:2022-08-04
Topics:
Takahashi, Kazuko
Sakae, Toshisada
Takase, Kahei
The title compound 3 was prepared in 4 steps starting from 2,5-dibromothiophene in good yield.This synthetic method is advantageous for the easy preparation of the annulenones having an inserted quinonoid ring.The compound 3 is quite stable and proved to have a highly bond-alternated olefinic character on the basis of NMR data and dipole moment.
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Doi:10.1246/bcsj.59.1635
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