Novel bile acid-based cyclic bisimidazolium receptors for anion recognition

Organic Letters
Vijay K KhatriPramod S Pandey

Abstract

[structure: see text] Novel deoxycholic acid-based cyclic receptors, 3 and 4, containing two imidazolium groups and m-xylene and p-xylene as spacers have been synthesized. These receptors bind anions through hydrogen bonds utilizing two imidazolium (C-H)(+) and inwardly directed methylene hydrogens of both acetyl groups. Receptor 3 shows a moderate selectivity for fluoride ion whereas receptor 4 shows high affinity and selectivity for chloride ion in CDCl(3).

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Oct 4, 2011·The Journal of Organic Chemistry·Rajesh K ChhatraPramod S Pandey

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