Novel dendritic cores based on thiacalix[4]arene derivatives |
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Authors: | Dietmar Appelhans Vaclav Stastny Hartmut Komber Brigitte Voit Ivan Stibor |
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Institution: | a Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany b Department of Organic Chemistry, Institute of Chemical Technology, Techniká 5, 166 28 Prague 6, Czech Republic |
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Abstract: | Thiacalix4]arenes possessing carboxylic groups were used for the design of potential dendritic cores with amino surface groups. The known tetraacetic acid in the 1,3-alternate conformation gave the desired product in very low yield because of steric hindrance on thiacalix4]arene moiety. Therefore, synthetic strategy based on withdrawing of the carboxyl groups via benzylic spacer from the thiacalix4]arene moiety was successfully applied for the realization of novel thiacalix4]arenes bearing two or four protected lysine units. |
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Keywords: | Thiacalixarenes Benzylic spacer Dendritic core Amino surface group |
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