Unusual Regioselectivity in the Reactions of Chlorocyclophosphazene-Containing Crown Ethers with Dinucleophiles |
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| Authors: | Krystyma Brandt Iwana Porwolik K. Placha T. Kupka A. Olejnik Robert. A. Shaw |
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| Affiliation: | 1. Institute of Polymer Chemistry, Polish Academy of Sciences , 41-800, Zabrze, M.Curie Sldodowskiej 34;2. Department of Chemistry , Birkbeck College London University , London, WC1H OPP, U.K. |
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| Abstract: | Abstract New macrocyclic ligands with cyclophosphazene sub-units, representing geminally diamino-bridged derivatives of BINO-crown type (III), and bisansa-cyclosubstituted ones of chiral PNP cryptand type (IV) have been obtained by the regioselective substitution reactions of monoansa(oxytetraethylenoxy) reactive PNP-crown, N3P3CI4[O(CH2CH20)4] (II) with the dinucleophiles, like alkylenediamines or sodium diarylates. The supramolecular control of these processes is discussed. |
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| Keywords: | regioselective substitution cyclophosphazenes crown ethers bis-crowns cryptands |
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