Calix[4]tubes: An Approach to Functionalization |
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Authors: | Kirill Puchnin Pavel Zaikin Dmitry Cheshkov Ivan Vatsouro Vladimir Kovalev |
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Institution: | Department of Chemistry, M. V. Lomonosov Moscow State University, Lenin's Hills, Moscow, 119991 (Russia), Fax: (+7)?495-932-8846. |
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Abstract: | Adamantylcalix4]arenes decorated with ester groups and calix4]arene tetratosylates were used to prepare a series of calix4]tubes bearing 3-methoxycarbonyl- and 3-methoxycarbonylmethyl-1-adamantyl units (up to eight) in good yield. These compounds were subjected to further chemical transformations giving a wide set of novel ester-, acid-, hydroxy-, amine-, and urea-functionalized calix4]tubes. Introduction of urea groups into the calixtube core led not only to anion-targeted receptors, but also provided heteroditopic behavior of the hosts, which enriches the well-established potassium-uptake ability of calix4]tubes. |
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