Synthesis of crownophanes possessing three pyridine rings

被引：5

作者：

Inokuma, Seiichi ^{[1
]}

Yatsuzuka, Takayaki ^{[1
]}

Ohtsuki, Shinji ^{[1
]}

Hino, Shota ^{[1
]}

Nishimura, Jun ^{[1
]}

机构：

[1] Gunma Univ, Grad Sch Engn, Dept Nanomat Syst, Kiryu, Gunma 3768515, Japan

来源：

TETRAHEDRON | 2007年 / 63卷 / 23期

关键词：

crown compound; cyclophane; extraction; Ag+-selective ionophore; 2+2] photocycloaddition;

D O I：

10.1016/j.tet.2007.03.099

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Novel crownophanes with three pyridine moieties (pyridinocrownophanes 4 and 5) were prepared by means of intramolecular [2+2] photocycloaddition of vinylpyridine derivatives. In the liquid-liquid extraction of heavy metal cations, 4 and 5 exhibited high efficiency toward Ag+. Comparing the high extractability and complexing stability constant for Ag+ to those of the corresponding pyridinocrownophanes 2 and 3 and observing the H-1 NMR spectra in the presence of Ag+. the ethereal oxygen atoms and the three nitrogen atoms were found efficiently and cooperatively to act as ligating sites. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5088 / 5094

页数：7

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