Cycloamylose complexation of adamantane derivatives

Area of Science:

• Supramolecular Chemistry
• Medicinal Chemistry

Background:

• Cyclodextrins are cyclic oligosaccharides with a hydrophobic cavity and hydrophilic exterior.
• Adamantane derivatives possess unique cage-like structures with potential therapeutic applications.

Purpose of the Study:

• To investigate the complexation of cyclohexaamylose (alpha-cyclodextrin) and cycloheptaamylose (beta-cyclodextrin) with various adamantane derivatives.
• To determine the thermodynamic parameters governing these host-guest interactions.

Main Methods:

• Spectrophotometric studies to monitor complex formation.
• pH potentiometric titrations to quantify binding constants.

Main Results:

• Both alpha-cyclodextrin and beta-cyclodextrin form stable aqueous complexes with all tested adamantane derivatives.
• Thermodynamic complex formation constants were determined for specific adamantane substrates, including amantadine and its related ions, and adamantane carboxylic acids and their ions.

Conclusions:

• The formation of inclusion complexes between cyclodextrins and adamantane derivatives is confirmed.
• Cyclodextrins show potential as therapeutic sequestering agents for adamantane-based drugs.