33494-01-8Relevant academic research and scientific papers
From enolates to anthraquinones
Bailey, David,Murphy, Jeffrey N.,Williams, Vance E.
, p. 659 - 666 (2007/10/03)
A series of highly reactive cyclopentadienones were prepared in situ from the corresponding hydroxycyclopent-2-enones and trapped with a variety of quinones. Reaction of 1,4-naphthoquinone with 4-hydroxy-3,4-diphenyl-cyclopent- 2-enone afforded 2,3-diphenylanthraquinone, whereas reaction of benzoquinone with this same cyclopentadienone precursor yielded a mixture of 6,7-dipheny 1-1,4-naphthoquinone and 2,3,6,7-tetraphenylanthraquinone. A number of other 2,3-diarylanthraquinones were likewise prepared in moderate yields from the reaction of 1,4-naphthoquinone with the appropriate 4-hydroxy-3,4- diarylcyclopent-2-enones. This method appears to be generally applicable to the synthesis of anthraquinone derivatives substituted at the 2- and 3-positions from inexpensive starting materials.
Chemical and Photochemical Behavior of Nondissociating Cyclopentadienone Dimers
Fuchs, Benzion,Pasternak, Mordechai,Pazhenchevsky, Barak
, p. 2017 - 2020 (2007/10/02)
The nondissociating character and endo configuration of the substituted cyclopentadienone dimers 2c,d along with the novel "mixed dimers" 2e,f were unequivocally demonstrated.Irradiation of the dimers 2c,d brings about only reversible 1,3-rearrangement to
