Efficient Oxidative Aromatization of 9,10-Dihydroanthracenes with Molecular Oxygen Catalyzed by Ruthenium Porphyrin Complex
作者:Tohru Yamada、Hirotaka Tanaka、Taketo Ikeno
DOI:10.1055/s-2003-37531
日期:——
In the presence of a catalytic amount of a ruthenium porphyrin complex, various 9,10-dihydroanthracene derivatives were aromatized with molecularoxygen to the corresponding anthracenes. It was found that the addition of sulfuric acid accelerated the aromatization at room temperature under atmospheric pressure of oxygen to afford various anthracenes in high yields.
A new InCl3-catalyzed reduction of anthrones and anthraquinones by using aluminum powder in aqueous media
作者:Chunyan Wang、Jieping Wan、Zhiguo Zheng、Yuanjiang Pan
DOI:10.1016/j.tet.2007.03.113
日期:2007.6
InCl3-catalyzed reduction of anthrones and anthraquinones was investigated under different conditions. A new synthetic method for anthracenes in aqueous media under mild conditions is described.
During the nitrous oxide oxidation of 9,10-dihydroanthracene derivatives catalyzed by the ruthenium-porphyrin complexes, anthraquinones were selectively afforded by the C-H oxidation of the benzylic carbon under the appropriate reaction conditions, whereas anthracenes as a result of oxidative aromatization were selectively obtained in the presence of sulfuric acid.
Substituted 9,10-dihydroanthracenes were oxidatively aromatized to the corresponding anthracenes effectively by using molecular oxygen as an oxidant and activated carbon (Darco KB, Aldrich, Inc.) as a promoter in xylene.