Recent developments in chiral polynitrogenated synthetic receptors for anions

In this mini-review, recent chiral receptors bearing polyamine and/or polyamide functional groups are reported. Two main features for their synthesis are the source of the enantiopure nitrogenated synthons and the strategy to assemble the building blocks within the receptor architecture. Combined solutions to both problems have been carried, ranging from chemoenzymatic methods to combinatorial approaches. Topics like conformational control or templation procedures are highlighted. Applications in chiral anion molecular recognition will be also discussed.