Improved preparation of perallylated cyclodextrins: facile synthesis of cyclodextrin-based polycationic and polyanionic compounds Original Research Article

An improved procedure for the perallylation of cyclodextrins allowed the preparation of O-perallylated α-, β-, and γ-cyclodextrins in 89, 91, and 88% yields, respectively. These were converted into two cyclodextrin-based functionalized compounds, the polycationic heptakis[2,3,6-tri-O-(6-amino-3-thiahexyl)]-β-cyclodextrin hydrochloride (3), and the polyanionic heptakis[2,3,6-tri-O-(sodium 5-carboxyl-3-thiapentyl)]-β-cyclodextrin (4), a potential inhibitor of HIV-1 replication.