25308-63-8Relevant academic research and scientific papers
A combined experimental and computational study on the cycloisomerization of 2-ethynylbiaryls catalyzed by dicationic arene ruthenium complexes
Yamamoto, Yoshihiko,Matsui, Kazuma,Shibuya, Masatoshi
, p. 7245 - 7255 (2015/05/05)
Ruthenium-catalyzed cycloisomerization of 2-ethynylbiaryls was investigated to identify an optimal ruthenium catalyst system. A combination of [η6-(p-cymene)RuCl2(PR3)] and two equivalents of AgPF6 effectively converted 2-ethynylbiphenyls into phenanthrenes in chlorobenzene at 120 °C over 20 h. Moreover, 2-ethynylheterobiaryls were found to be favorable substrates for this ruthenium catalysis, thus achieving the cycloisomerization of previously unused heterocyclic substrates. Moreover, several control experiments and DFT calculations of model complexes were performed to propose a plausible reaction mechanism.
1-Phenylisobenzofuran, 1-Phenylnaphthofuran, 1-Phenylnaphthofuran, and 3-Phenylnaphthofuran via Cyclic Hemiaminal, Hemiacetal, and Acetal Precursors
Smith, James G.,Fogg, Deryn E.,Munday, Ian J.,Sandborn, Richard E.,Dibble, Peter W.
, p. 2942 - 2953 (2007/10/02)
The title compounds have been generated via cyclic hemiaminal, hemiacetal, and acetal precursors and trapped in Diels-Alder reactions with several dienophiles.The precursors are easily prepared from o-bromobenzyl alcohol, 2-bromo-3-naphthalenemethanol, or
Properties of the Liquid Crystals formed by Certain 4-Alkoxy-N-(2-phenanthrylmethylene)anilines
Brown, John W.,Byron, David J.,Fawcett, Linda A.,Wilson, Robert C.,Gillyon, Andrew M.,et al.
, p. 1593 - 1596 (2007/10/02)
The liquid crystal transition temperatures of twelve 4-alkoxy-N-(2-phenanthrylmethylene)anilines are reported and compared with those of corresponding members of similar homologous series of azomethines.Differences in liquid crytal thermal stability between comparable azomethines in which the -CH=N- linkage is reversed are discussed.
