节点文献

Oxidation of 2,2’-Dihydroxy-3,3’-di-tert-buty-5,5’-dimethoxyl-biphenyl to 3,3’-Di-tert-butylbiphenyl-2,5,2’,5’-diquinone with Copper(Ⅱ)Chloride as Catalyst:Synthesis,Structure and Spectral Properties of Diquinone

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 LI Jun-Xiaa② WANG Jian-Gea HUANG Wei-Pingb a(College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang,Henan 471022,China)b(College of Chemistry,Nankai University,Tianjin 300071,China)

【机构】 College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang； College of Chemistry,Nankai University；

【摘要】 Use of free air as oxidant and copper(II)chloride as catalyst,3,3’-di-tert-butylbi-phenyl-2,5,2’,5’-diquinone(BBDQ)was prepared via catalytic oxidation of 2,2’-dihydroxy-3,3’-di-tert-butyl-5,5’-dimethoxy-biphenyl(di-BHA).The yield of reaction attained 95% and the selectivity for BBDQ was 100%.The single-crystal X-ray diffraction analysis reveals that the dihedral angle between two rings(benzene rings for di-BHA and quinone rings for BBDQ)changes from 89.8 to 45.3o,indicating the steric hindrance effects of methyl disappear in the oxidation process.The crystal structures of di-BHA and BBDQ are further confirmed by their spectral characterizations.The probable mechanism for this oxidation process is also discussed.更多还原

【Abstract】 Use of free air as oxidant and copper(II)chloride as catalyst,3,3’-di-tert-butylbi-phenyl-2,5,2’,5’-diquinone(BBDQ)was prepared via catalytic oxidation of 2,2’-dihydroxy-3,3’-di-tert-butyl-5,5’-dimethoxy-biphenyl(di-BHA).The yield of reaction attained 95% and the selectivity for BBDQ was 100%.The single-crystal X-ray diffraction analysis reveals that the dihedral angle between two rings(benzene rings for di-BHA and quinone rings for BBDQ)changes from 89.8 to 45.3o,indicating the steric hindrance effects of methyl disappear in the oxidation process.The crystal structures of di-BHA and BBDQ are further confirmed by their spectral characterizations.The probable mechanism for this oxidation process is also discussed.更多还原

【关键词】 catalytic oxidation； 3； 3’-di-tert-butylbiphenyl-2； 5； 2’； 5’-diquinone； 2； 2’-dihydroxy-3； 3’-di-tert-butyl-5； 5’-dimethoxybiphenyl； copper(II)chloride；
【Key words】 catalytic oxidation； 3； 3’-di-tert-butylbiphenyl-2； 5； 2’； 5’-diquinone； 2； 2’-dihydroxy-3； 3’-di-tert-butyl-5； 5’-dimethoxybiphenyl； copper(II)chloride；

【基金】 supported by the 973 Program (2005CB623607);the National Natural Science Foundation of China (No.20771061);the scientific program 2008BAE64B09

【文献出处】结构化学 ,Chinese Journal of Structural Chemistry , 编辑部邮箱 ,2011年10期

【分类号】O643.32
【下载频次】14

知网节下载

节点文献中：

本文链接的文献网络图示:

本文的引文网络

节点文献