Differential and substrate-selective reactivity of calix[4]arene derivatives with cyclenyl-Zn(II) modifications at the upper rim

被引：26
|
作者：
Ozturk, G [1 ]
Akkaya, EU [1 ]
机构：
[1] Middle E Tech Univ, Dept Chem, TR-06531 Ankara, Turkey
来源：
ORGANIC LETTERS | 2004年 / 6卷 / 02期
关键词：
D O I：
10.1021/ol0360694
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
[GRAPHICS] Novel "cone conformation" calix[4]arene derivatives, carrying either one or two cyclen (1,4,7,10-tetra-azacyclododecane) moieties at the upper rim, have been synthesized. The hydrolytic activities of the Zn(II) complexes of these calixarenes were studied. A surprising behavior was observed with p-nitrophenylstearate; whereas the bis-cyclenyl-2Zn(II) complex showed negligible hydrolytic activity over the background, the mononuclear complex showed a significant 400-fold rate increase at pH 8.5.
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页码：241 / 243
页数：3
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