Cation binding properties of a novel 1,3-alternate calix[4]biscrown. Formation of 1:1 and 1:2 complexes and unique cation tunneling across a calix[4]arene cavity

Kwang Nak Koh, Koji Araki, Seiji Shinkai, Zouhair Asfari, Jacques Vicens

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A novel 1,3-alternate calix[4]biscrown was synthesized by the reaction of calix[4]arene and tetraethyleneglycol ditosylate in the presence of K2 CO3. It formed a 1:2 complex as well as a 1:1 complex with alkali metal and ammonium cations and the cation tunneling phenomenon across the calix[4]arene cavity was detectable with 1H NMR spectroscopy even at room temperature.

Original languageEnglish
Pages (from-to)6095-6098
Number of pages4
JournalTetrahedron Letters
Issue number34
Publication statusPublished - Aug 21 1995


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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