2,4,5,7-TETRANITRO-9-FLUORENONE (746-53-2) 's Synthetic route

Fulvalene Derivatives Containing a Tetrabenzofluorene Unit: New Nonplanar Fulvalenes with High Electron Affinity

Yamada, Kenta  Shibamoto, Hiroshi  Tanigawa, Yusuke  Ishikawa, Hiroyuki  Nishida, Jun-Ichi  Kitamura, Chitoshi  Kurata, Hiroyuki  Kawase, Takeshi

17H-Tetrabenzo[a,c,g,i]fluoren-17-one possessing a nonplanar, helicene-like structure was efficiently prepared by aerial oxidation of 17H-tetrabenzo[a,c,g,i]fluorene under mild basic conditions. A quinone methide and an unsymmetrical fulvalene containing a tetrabenzofluorene unit were synthesized from the ketone. Treatment of 17-bromotetrabenzo[a,c,g,i]fluorene with a base afforded a symmetric fulvalene as an air-sensitive blue solid. Electrochemical analyses revealed that these compounds have high electron affinities.