Synthesis of calixarene-based ketocyanine fluorophores
摘要:
Cup-shaped calix[4]arenes bearing one or two ketocyanine fluorophore fragments at the wide rim of the macrocycle are synthesized by condensation of formyl calix[4]arenes with arylmethylene(hetarylmethylene)cyclopentanones in the presence of the ionic liquid, dimethylammonium dimethylcarbamate (DIMCARB) and characterized using UV-vis and fluorescence spectroscopy. Strong positive solvatofluorochromism for the calixarene ketocyanines is observed. (C) 2011 Elsevier Ltd. All rights reserved.
Calix[4]arene-α-hydroxyphosphonic acids. Synthesis, stereochemistry, and inhibition of glutathione S-transferase
作者:Sergiy O. Cherenok、Olexander A. Yushchenko、Vsevolod Yu. Tanchuk、Iryna M. Mischenko、Nataliya V. Samus、Olexander V. Ruban、Yuriy I. Matvieiev、Julia A. Karpenko、Valery P. Kukhar、Andriy I. Vovk、Vitaly I. Kalchenko
DOI:10.3998/ark.5550190.0013.421
日期:——
A series of dipropoxy-, tripropoxy- and tetrapropoxycalix(4)arenes bearing one or two fragments of α-hydroxymethylphosphonic acid at the upper rim of the macrocycle was prepared by the reaction of the corresponding mono- and di-formylcalixarenes with sodium salts of dialkyl phosphites or with trialkyl (tristrimethylsilyl)phosphites followed by dealkylation (desilylation) of the ester derivatives. The
通过相应的单-和二-甲酰基杯芳烃与二烷基钠盐的反应,制备了一系列在大环上缘带有一个或两个α-羟甲基膦酸片段的二丙氧基-、三丙氧基-和四丙氧基杯(4)芳烃。亚磷酸酯或与三烷基(三甲基甲硅烷基)亚磷酸酯,然后酯衍生物的脱烷基化(脱甲硅烷基化)。通过 1 H NMR研究了大环骨架的构象和所得化合物的立体异构形式。发现所得的α-羟甲基膦酸能够在体外抑制谷胱甘肽S-转移酶的活性。