Cation control on the synthesis of p-t-butylthiacalix[4]-(bis)crown ethers


Leeuwen, Fijs W.B. van and Beijleveld, Hans and Kooijman, Huub and Spek, Anthony L. and Verboom, Willem and Reinhoudt, David N. (2002) Cation control on the synthesis of p-t-butylthiacalix[4]-(bis)crown ethers. Tetrahedron Letters, 43 (52). pp. 9675-9678. ISSN 0040-4039

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Abstract:Bridging of p-t-butylthiacalix[4]arene with ethylene glycol ditosylates gave diametrically bridged thiacalix[4]monocrowns-4 and -5, 1,2-alternate thiacalix[4]biscrowns-4 and -5 and 1,3-alternate thiacalix[4]biscrown-5, dependent on the metal carbonate used. They show excellent extraction ability towards Ag+ cations.
The synthesis of novel diametrically and proximally substituted p-t-butylthiacalix[4](bis)crown ethers and their extraction behavior towards monovalent metal ions are presented.
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Copyright:© 2002 Elsevier
Science and Technology (TNW)
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Metis ID: 209403