title: A carbohydrate-anion recognition system in aprotic solvents.
abstract: A carbohydrate-anion recognition system in nonpolar solvents is reported, in which complexes form at the B-faces of β-D-pyranosides with H1-, H3-, and H5-cis patterns similar to carbohydrate-π interactions. The complexation effect was evaluated for a range of carbohydrate structures; it resulted in either 1:1 carbohydrate-anion complexes, or 1:2 complex formation depending on the protection pattern of the carbohydrate. The interaction was also evaluated with different anions and solvents. In both cases it resulted in significant binding differences. The results indicate that complexation originates from van der Waals interactions or weak CH⋅⋅⋅A(-) hydrogen bonds between the binding partners and is related to electron-withdrawing groups of the carbohydrates as well as increased hydrogen-bond-accepting capability of the anions.
authors.affiliation: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, 430074, Wuhan (P.R. China), Fax: (+86) 27-87793242.
authors.forename: Bo
authors.initials: B
authors.lastname: Ren
authors.forename: Hai
authors.initials: H
authors.lastname: Dong
authors.forename: Olof
authors.initials: O
authors.lastname: Ramström
mesh_terms: D000838:Anions; D002236:Carbohydrate Conformation; D002241:Carbohydrates / Q000737:chemistry*; D006860:Hydrogen Bonding; D009573:Nitrites / Q000737:chemistry; D012997:Solvents
chemical_list: D000838:Anions; D002241:Carbohydrates; D009573:Nitrites; D012997:Solvents
keywords: anions; carbohydrates; molecular recognition; pi interactions; supramolecular chemistry