78237-45-3Relevant academic research and scientific papers
Polycyclic Aromatic Compounds: Part III-Synthesis of 1,3-Diaryl-2,8-dihydro-2,8-dioxocyclopentadienes and Their Conversion into Fluorenone and Fluorene Derivatives
Bandyopadhyay, T.K.,Bhattacharya, A.J.
, p. 91 - 94 (2007/10/02)
1,3-Diaryl-2,8-dihydro-2,8-dioxocyclopentadienes (IV) have been prepared from ninhydrin hydrate (I) and 4,4'-disubstituted dibenzyl ketones (II).During the formation of (IV), a side product has also been isolated, and assigned structure (V) based on chemical and spectral evidences.The dienones (IV) readily undergo cycloaddition reaction with ethylenic and acetylenic compounds forming fluorenone derivatives which on subsequent reduction afford fluorenones.
