TAKAHASHI K.; SAKAL T.; TAKASE K., CHEM. LETT., 1980, NO 2, 179-182
作者:TAKAHASHI K.、 SAKAL T.、 TAKASE K.
DOI:——
日期:——
SYNTHESIS AND PROPERTIES OF 5-CYCLOHEPTATRIENYLIDENE-2(5<i>H</i>)-THIOPHENONE
作者:Kazuko Takahashi、Toshisada Sakae、Kahei Takase
DOI:10.1246/cl.1980.179
日期:1980.2.5
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.