title: A convenient route to diversely substituted icosahedral closomer nanoscaffolds.
abstract: The design and synthesis of icosahedral polyhedral borane closomer motifs based upon carbonate and carbamate anchoring groups for biomedical applications are described. Dodecacarbamate closomers containing easily accessible groups of interest at their linker termini were synthesized via activation of the B-OH vertices as aryl carbonates and their subsequent reaction with primary amines. Novel dodecacarbonate closomers were successfully synthesized for the first time by reacting [closo-B(12)(OH)(12)](2-) with an excess of respective aryl chloroformates, utilizing relatively short reaction times, mild conditions and simple purification strategies, all of which had previously presented difficulties in closomer chemistry. This methodology for the 12-fold degenerate synthesis of carbonate and carbamate closomers will greatly facilitate further exploration of closomers as monodisperse nanomolecular delivery platforms.
authors.affiliation: International Institute of Nano and Molecular Medicine, School of Medicine, University of Missouri, 1514 Research Park Drive, Columbia, Missouri 65211.
authors.forename: Satish S
authors.initials: SS
authors.lastname: Jalisatgi
authors.forename: Vikas S
authors.initials: VS
authors.lastname: Kulkarni
authors.forename: Betty
authors.initials: B
authors.lastname: Tang
authors.forename: Zachary H
authors.initials: ZH
authors.lastname: Houston
authors.forename: Mark W
authors.initials: MW
authors.lastname: Lee
authors.forename: M Frederick
authors.initials: MF
authors.lastname: Hawthorne
mesh_terms: D001880:Boranes / Q000138:chemical synthesis / Q000737:chemistry*; D002219:Carbamates / Q000138:chemical synthesis / Q000737:chemistry*; D002254:Carbonates / Q000138:chemical synthesis / Q000737:chemistry*; D004337:Drug Carriers / Q000138:chemical synthesis / Q000737:chemistry; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry*
chemical_list: D001880:Boranes; D002219:Carbamates; D002254:Carbonates; D004337:Drug Carriers