Membrane extraction of organic compounds. 3. A new receptor fragment for carboxylate groups based of the calix[4]arene platform |
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Authors: | Antipin I S Stoikov I I Khrustalev A A Konovalov A I |
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Institution: | (1) Kazan State University, 18, ul. Kremlevskaya, 420008 Kazan, Russian Federation;(2) A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8, ul. Arbuzova, 420088 Kazan, Russian Federation |
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Abstract: | A new type of macrocyclic receptor able to bind organic substrates containing carboxy and carboxylate groups was designed on the basis of 1,3-disubstituted calix4]arenes. A series of disubstitited calix4]arenes were prepared in 60—80% yields by selective 1,3-alkylation of p-tert-butylcalix4]arene. The compounds obtained were tested as carriers for dl-tartaric, glycolic, dl-amygdalic, and dl-glutamic acids through liquid membranes immobilized on a polymer matrix. The structural factors favorable for the transport of these hydrophilic substrates through lipophilic membranes were established. |
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Keywords: | calix[4]arene alkylation membrane transport -hydroxy acids" target="_blank">gif" alt="agr" align="BASELINE" BORDER="0">-hydroxy acids -amino acids" target="_blank">gif" alt="agr" align="BASELINE" BORDER="0">-amino acids |
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