Various aryl-substituted 1,4-benzoquinone derivatives have been prepared via a palladium-catalyzeddecarboxylativecross-coupling of electron-rich aromatic acids with 1,4-benzoquinones.
通过钯催化的富电子芳香酸与 1,4-苯醌的脱羧交叉偶联制备了各种芳基取代的 1,4-苯醌衍生物。
Practical C−H Functionalization of Quinones with Boronic Acids
作者:Yuta Fujiwara、Victoriano Domingo、Ian B. Seiple、Ryan Gianatassio、Matthew Del Bel、Phil S. Baran
DOI:10.1021/ja111152z
日期:2011.3.16
quinones with several boronic acids has been developed. This scalable reaction proceeds readily at room temperature in an open flask using inexpensive reagents: catalytic silver(I) nitrate in the presence of a persulfate co-oxidant. The scope with respect to quinones is broad, with a variety of alkyl- and arylboronicacids undergoing efficient cross-coupling. The mechanism is presumed to proceed through
Substituent Effects on Reactive Oxygen Species (ROS) Generation by Hydroquinones
作者:Allimuthu T. Dharmaraja、Charu Jain、Harinath Chakrapani
DOI:10.1021/jo501796z
日期:2014.10.3
hydroquinones and their ability to generate reactive oxygen species (ROS), we designed and synthesized a series of 6-aryl-2,3-dihydro-1,4-benzoquinones. These compounds equilibrate with the corresponding 6-aryl-1,4-dihydroxybenzenes in an organic medium; a linearfreeenergyrelationship analysis gave ρ = +2.37, suggesting that this equilibrium was sensitive to electroniceffects. The propensity of the compound
Rh-Catalyzed [2 + 2 + 2] Cycloadditions with Benzoquinones: De Novo Access to Naphthoquinones for Lignan and Type II Polyketide Synthesis
作者:James M. Wood、Eufrânio N. da Silva Júnior、John F. Bower
DOI:10.1021/acs.orglett.9b04266
日期:2020.1.3
The first examples of Rh-catalyzed [2 + 2 + 2] cycloadditions between diynes and benzoquinones are described. The method enables de novo and step-economical access to challenging naphthoquinones that are of relevance to lignan and type II polyketide synthesis. The value of the chemistry is demonstrated by a short total synthesis of justicidone.