64465-03-8Relevant academic research and scientific papers
An unusual cobalt-mediated cleavage of a hindered alkyne
Hayashi, Naoto,Ho, Douglas M.,Pascal Jr., Robert A.
, p. 4261 - 4264 (2000)
When 1-(pentaphenylphenyl)-2-phenylacetylene (1) is heated with (η5- cyclopentadienyl)dicarbonylcobalt, 1,2,3,4-tetraphenylfluorene (3) and related minor products are formed rather than the expected tetraarylcyclobutadiene. The formation of 3 requires that a seven-carbon fragment (formally a phenylcarbyne) must be lost. Two minor products, however, result from intramolecular cyclization of the alkyne and these two retain all of the carbons from the starting material. (C) 2000 Elsevier Science Ltd.
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 I - A New Synthesis of Fluorenone Fluorene Derivatives
Bandyopadhyay, T. K.,Bhattacharya, A. J.
, p. 439 - 442 (2007/10/02)
A series of hitherto unknown highly substituted fluorenone and fluorene derivatives has been synthesised.The synthesis involves Diels-Alder cycloaddition reaction of cyclopentadienones with ethyl esters of phenyl- and p-methylphenylpropiolic acids.The add
