| Summary: | A new fluorinated pentaphene derivative has been obtained as a potential precursor for fluorinated polycyclic aromatic hydrocarbons. In this work, 7,7-difluoropentaphen-6(7<i>H</i>)-one was prepared from 1,1-difluoroanthracen-2(1<i>H</i>)-one via the Diels–Alder reaction with <i>o</i>-quinodimethane generated in situ from <i>o</i>-bis(dibromomethyl)benzene. The structure of the newly synthesized compound was confirmed by <sup>1</sup>H, <sup>13</sup>C, <sup>19</sup>F NMR, IR and UV/Vis spectroscopy, as well as high-resolution mass spectrometry.
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