Cyclodextrin polymers are polymeric derivatives which have multiple cyclodextrins

and they have the high performance of both

β

-cyclodextrin and polymers

so they are widely used in the areas including molecular recognition

separation and analytical techniques

biomedical engineering

environmental protection

etc. The synthesis of cyclodextrin polymers has been given abroad attention

and the functionalization of

β

-cyclodextrin monomer is the key step of synthesis of

β

-cyclodextrin polymers. The synthesis methods of

β

-cyclodextrin monomer with functional groups were reviewed

including modifying it to

β

-cyclodextrin monomer with highly active functional groups

to cyclodextrin monomers carrying vinyl group and to cyclodextrin monomers with multiple substituted functional groups

etc.