Generation-independent dimerization behavior of quadruple hydrogen-bond-containing oligoether dendrons

被引:55
作者
Wong, CH [1 ]
Chow, HF
Hui, SK
Sze, KH
机构
[1] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Ctr Novel Funct Mol, Shatin, Hong Kong, Peoples R China
[3] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
关键词
D O I
10.1021/ol0603716
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A new series of self-assembling G1-G3 dendronized dimers bearing oligoether dendrons and a dimeric 2-ureido-4-pyrimidinone (UPy) quadruple hydrogen-bonding core were prepared and characterized. It was found that the nonpolar microenvironment created by the dendrons preserved the UPy unit in its DDAA tautomeric form. As a result, the stabilities of the dimers were exceptionally strong for all three generations (K-dim(.) > 2 x 10(7) M-1 in CDCl3 at 25 degrees C). Furthermore, the steric size of the dendrons did not exhibit a significant effect on their dimerization behavior.
引用
收藏
页码:1811 / 1814
页数:4
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