Pincer Receptors for Anions Based on Triazolyl Bile Acids

Resumo

Copper-catalyzed 1,3-dipolar cycloaddition of azides to acetylenes successfully afforded pincer bistriazolium receptor containing two lithocholic acid fragments and phenylphosphonic diamide bridge. The obtained receptor showed high complexing power toward fluoride ions and organic acid anions, which decreased in the series fluoride > succinate ≥ malonate > oxalate ≥ lithocholate > benzoate > acetate > hydrogen sulfate > bromide.