New aspects of synthesis and properties of arylated cyclopentadienes

被引：23

作者：

Dyker, G

Heiermann, J

Miura, M

机构：

[1] Ruhr Univ Bochum, Fac Chem, D-44780 Bochum, Germany

[2] Osaka Univ, Fac Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan

来源：

ADVANCED SYNTHESIS & CATALYSIS | 2003年 / 345卷 / 9-10期

关键词：

CH activation; cyclopentadienes; palladium catalysis; rotamers;

D O I：

10.1002/adsc.200303079

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The multifold palladium-catalysed arylation is a suitable method for the synthesis of sterically crowded cyclopentadienes bearing up to five ortho-substituted aryl groups. A maximum of four mesitylene groups can be introduced. While penta(para-xylyl)cyclopentadiene and pentakis(2-chlorophenyl)cyclopentadiene exhibit at least six rotamers in the proton NMR spectrum, only two rotamers are registered for the tetra(2-chlorophenyl)cyclopentadiene; the all-trans isomer is identified as the major one both by spectroscopy and by semi-empirical calculations.

引用

收藏

页码：1127 / 1132

页数：6

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