Poly ammonium macrocycle

Receptors for anions vary widely, and are in many instances either the same or modified versions of the ligands that bind transition metal ions [5-20], For example, poly amine macrocycles can bind transition metal ions, while poly ammonium macrocycles bind anions. In many instances the same ligand can bind either a transition metal ion [21-24] or an anion [25-29],... 

This review presents the syntheses of different analogs of sucrose. Transformations of this di-saccharide at the terminal positions (Cl, or C6, or C6 ) provide modified sucroses such as amines, uronic acids, thiols, or phosphorus derivatives. Preparation of so-called higher sucroses i.e. derivatives in which the terminal positions are elongated by a poly-hydroxylated carbon chain is also reviewed. Special attention is directed to the synthesis and properties of macrocyclic derivatives crown- and aza-crown ethers with sucrose scaffold. Such macrocyclic receptors exhibit interesting complexing properties towards chiral ammonium salts. 

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