[2]rotaxanes containing pyridinium-phosphonium axles and 24-crown-8 ether wheels

被引：31

作者：

Georges, N ^{[1
]}

Loeb, SJ ^{[1
]}

Tiburcio, J ^{[1
]}

Wisner, JA ^{[1
]}

机构：

[1] Univ Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4, Canada

来源：

ORGANIC & BIOMOLECULAR CHEMISTRY | 2004年 / 2卷 / 19期

关键词：

D O I：

10.1039/b407653b

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A triethylphosphonium group attached to a pyridinium ethane moiety can be used as an axle for the self-assembly of [ 2] pseudorotaxanes and [ 2] rotaxanes. Although [ 2] pseudorotaxane formation is limited due to the bulk of the PR4+ group, [ 2] rotaxanes can be formed utilising 24-crown-8 ether, benzo-24-crown-8 ether and naphtho-24-crown-8 ether. The synthesis of these [ 2] rotaxanes and the X-ray structure of the [ 2] rotaxane containing a 24-crown-8 ether wheel are described. When the crown ether contains an aromatic group two possible conformational isomers exist; these are identified at low temperature by H-1 and P-31 NMR spectroscopy.

引用

页码：2751 / 2756

页数：6

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