title: Glycoluril dimer isomerization under aqueous acidic conditions related to cucurbituril formation.
abstract: A water-soluble methylene-bridged glycoluril dimer 2S was isolated. It was shown that 2S is the only kinetic product of the reaction between glycoluril derivative 1 and paraformaldehyde. Compound 2S is subsequently intermolecularly transformed into its diastereomer 2C. The kinetics and thermodynamics of the S- to C-shaped dimer isomerization were investigated under reaction conditions similar to those for cucurbituril synthesis.
authors.affiliation: Department of Chemistry, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
authors.forename: Marek
authors.initials: M
authors.lastname: Stancl
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Gargulakova
authors.forename: Vladimir
authors.initials: V
authors.lastname: Sindelar