Synthesis and Extracting Abilities of Calix[4]resorcinarene-based Schiff Base Derivatives

Abstract

Abstract: Two noval calix[4]resorcinarene-based Schiff bases, 4a and 4b, which contain eight or twelve long salicylideneimine chains were easily synthesized by treating the corresponding calix[4]resorcinarenes bearing amine chains with different lengths, 3a and 3b, and salicylaldehyde in alcohol. These two amides, 3a and 3b, were obtained in a high yield by treating activated ethoxycarbonylmethoxy substituted derivatives 2a and 2b with excess 1,6-hexanediamine. All the organic compounds were characterized by IR and ¹H NMR spectroscopy. It was found that the functional salicylideneimine arms appended to the peripheries of calix[4]resorcinarenes can fine-adjust the size and shape of the cavity upon complexation with metal ions, which significantly enhances the cation extractability.

Key words: Calix[4]resorcinarene, Schiff base, Metal ions, Synthesis, Extraction

CLC Number:

O625

TrendMD:

GE Yun, YAN Chao-Guo . Synthesis and Extracting Abilities of Calix[4]resorcinarene-based Schiff Base Derivatives[J]. Chem. J. Chinese Universities, 2004, 25(10): 1836.

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Synthesis and Extracting Abilities of Calix[4]resorcinarene-based Schiff Base Derivatives

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