title: Acyclic cucurbit[n]uril-type molecular containers: influence of aromatic walls on their function as solubilizing excipients for insoluble drugs.
abstract: We studied the influence of the aromatic sidewalls on the ability of acyclic CB[n]-type molecular containers (1a-1e) to act as solubilizing agents for 19 insoluble drugs including the developmental anticancer agent PBS-1086. All five containers exhibit good water solubility and weak self-association (Ks ≤ 624 M(-1)). We constructed phase solubility diagrams to extract Krel and Ka values for the container·drug complexes. The acyclic CB[n]-type containers generally display significantly higher Ka values than HP-β-CD toward drugs. Containers 1a-1e bind the steroidal ring system and aromatic moieties of insoluble drugs. Compound 1b displays highest affinity toward most of the drugs studied. Containers 1a and 1b are broadly applicable and can be used to formulate a wider variety of insoluble drugs than was previously possible with cyclodextrin technology. For drugs that are solubilized by both HP-β-CD and 1a-1e, lower concentrations of 1a-1e are required to achieve identical [drug].
authors.affiliation: Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.
authors.forename: Ben
authors.initials: B
authors.lastname: Zhang
authors.forename: Lyle
authors.initials: L
authors.lastname: Isaacs
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry; D000970:Antineoplastic Agents / Q000737:chemistry*; D002412:Cations; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D018360:Crystallography, X-Ray; D003505:Cyclodextrins / Q000737:chemistry; D015195:Drug Design; D005079:Excipients / Q000737:chemistry*; D007700:Kinetics; D047028:Macrocyclic Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011485:Protein Binding; D012995:Solubility; D013256:Steroids / Q000737:chemistry; D000099246:Cucurbit(n)urils
chemical_list: D064751:Ammonium Compounds; D000970:Antineoplastic Agents; D002412:Cations; D003505:Cyclodextrins; D005079:Excipients; D047028:Macrocyclic Compounds; D013256:Steroids; D000099246:Cucurbit(n)urils