Tweezers-Type Anion Receptors Based on Diphenoxymethane and Biphenol Bearing Urea Groups

Shintaro Higuchi; Kazuaki Ito

doi:10.2174/157017807781467597

Abstract

Diphenoxymethane (1a and 1b) and biphenol derivatives (1c and 1d) bearing urea groups were prepared to be used in anion recognition. Diphenoxymethane derivative (1a) selectively bound chloride anion (Cl-) in 1:1 complexes. However, biphenol derivatives (1c and 1d) did not show a clear selectivity in anion recognition. The association constants of the complexes were determined by 1H-NMR titrations in CDCl3.

Keywords: Anion receptor, urea, biphenol, diphenoxymethane, chloride anion selectivity

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Letters in Organic Chemistry

Title: Tweezers-Type Anion Receptors Based on Diphenoxymethane and Biphenol Bearing Urea Groups

Volume: 4 Issue: 6

Author(s): Shintaro Higuchi and Kazuaki Ito

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Keywords: Anion receptor, urea, biphenol, diphenoxymethane, chloride anion selectivity

Abstract: Diphenoxymethane (1a and 1b) and biphenol derivatives (1c and 1d) bearing urea groups were prepared to be used in anion recognition. Diphenoxymethane derivative (1a) selectively bound chloride anion (Cl-) in 1:1 complexes. However, biphenol derivatives (1c and 1d) did not show a clear selectivity in anion recognition. The association constants of the complexes were determined by 1H-NMR titrations in CDCl3.

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Shintaro Higuchi and Kazuaki Ito , Tweezers-Type Anion Receptors Based on Diphenoxymethane and Biphenol Bearing Urea Groups, Letters in Organic Chemistry 2007; 4 (6) . https://dx.doi.org/10.2174/157017807781467597