Abstract
Co-receptor 1,3-calix[4]-di(aza-benzo)crown-crown-6 (1-H) designed with one calix[4]arene in a 1,3-alternate conformation and ‘hard’ and ‘soft’ metal ion binding sites has been prepared according to three pathways (A-C). Pathway B, consisting of two different 1 + 1 condensations with ditosylate derivatives, was shown to be the most efficient.
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Pulpoka, B., Asfari, Z. & Vicens, J. Synthesis of a Calix[4]arene Containing 'Hard' and 'Soft' Metal Ion Binding Sites. Journal of Inclusion Phenomena 27, 21–30 (1997). https://doi.org/10.1023/A:1007962601884
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DOI: https://doi.org/10.1023/A:1007962601884