Copper(0)/Selectfluor System-Promoted Oxidative Carbon–Carbon Bond Cleavage/Annulation of <i>o</i>-Aryl Chalcones: An Unexpected Synthesis of 9,10-Phenanthraquinone Derivatives
作者:Hanyang Bao、Zheng Xu、Degui Wu、Haifeng Zhang、Hongwei Jin、Yunkui Liu
DOI:10.1021/acs.joc.6b02212
日期:2017.1.6
A general and efficient protocol for the synthesis of 9,10-phenanthraquinone derivatives has been successfully developed involving a copper(0)/Selectfluor system-promoted oxidative carbon–carbonbond cleavage/annulation of o-aryl chalcones. A variety of substituted 9,10-phenanthraquinones were synthesized in moderate to good yields under mild reaction conditions.
The relationship between the constitution and the effect of chemical compounds on plant growth. VI.—some derivatives of fluorene
作者:R. L. Jones、T. P. Metcalfe、W. A. Sexton
DOI:10.1002/jsfa.2740050106
日期:1954.1
Geotropic and phototropic responses of seedlings of rape, wheat and rye-grass are inhibited by 9-fluorenol-9-carboxylic acid and certain of its substituted derivatives. The antitropic effect of these and other acidic aromatic substances is discussed, and it is suggested that they may act through a competitive interference with the lateral transport of β-indolylacetic acid.
Palladium(II)-Catalyzed Tandem γ-C(sp2)–H Arylation and Cyclization for the Construction of Natural Product-Like Polycyclic Fused ortho-Quinone Scaffolds
作者:Xingjun Li、Yu Chen、Xiong Xie、Jing Li、Jiang Wang、Hong Liu
DOI:10.1021/acs.orglett.4c00900
日期:2024.4.26
a novel strategy for the direct construction of polycyclic fused ortho-quinone scaffolds through palladium(II)-catalyzedtandem γ-C(sp2)–H arylation and cyclization of arylglyoxals with aryl iodides. This transformation features unique tandem transient directing of γ-C(sp2)–H arylation and cyclization reaction mode, broad substrate scope, especially for the aromatic substrates containing oxygen and