78237-39-5Relevant academic research and scientific papers
Coupling of the R-Cp or indenyl ligand with the diene moiety of bis(substituted cyclopentadienyl)- or bis(indenyl)zirconacyclopentadienes
Ren, Shenyong,Igarashi, Eri,Nakajima, Kiyohiko,Kanno, Ken-ichiro,Takahashi, Tamotsu
supporting information; experimental part, p. 7492 - 7493 (2009/10/17)
(Chemical Equation Presented) When bis(substituted cyclopentadienyl)- orbis(indenyl)zirconacyclopentadienes were treated with TiCl4, a coupling reaction between the substituted cyclopentadienyl or indenyl ligand and the diene moiety proceeded to give indene or fluorene deriva tives in moderate to high yields. With the sterically hindered t-Bu-substituted Cp ligand, the coupling products were obtained in high yields.
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.
