NOVEL DIPHENOQUINONE-TYPE REDOX SYSTEMS CONTAINING SEVEN-MEMBERED QUINONOID STRUCTURE
5-(3,5-Di-t-butyl-4-hydroxyphenyl)tropolone (5) and 5,5'-bitropolone (7) were synthesized using transition-metal-catalyzed coupling reactions.Oxidation of 5 afforded the diphenoquinone-type trione (6); however, 7 could not be converted into 8.The quinonoid character of 6 is discussed on the basis of the electrochemical redox behavior.
Iyoda, Masahiko,Sato, Koichi,Oda, Masaji
p. 625 - 628
(2007/10/02)
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