Preorganized macromolecular gene delivery systems: amphiphilic beta-cyclodextrin "click clusters".

Gene delivery systems based on the beta-cyclodextrin scaffold have been synthesized by combining the copper(I)-catalyzed azide-alkyne coupling ("click chemistry") and an efficient acylation method of the secondary hydroxyls; molecular flexibility, charge density and hydrophobic-hydrophilic balance are critical parameters that can be fine-tuned by the click approach.