Self-Association of Facially Amphiphilic Methylene Bridged Glycoluril Dimers
摘要:
GRAPHICSFacially amphiphilic derivatives of methylene bridged glycoluril dimers are a versatile model system for systematic studies of self-assembly in water. Thorough physical organic characterization, including analytical ultracentrifugation, a technique rarely used in synthetic self-assembly studies, allows us to conclude that this class of molecules undergoes hydrophobically driven self-association to yield tightly associated discrete dimeric assemblies.
Diastereoselective Formation of Methylene-Bridged Glycoluril Dimers
作者:Dariusz Witt、Jason Lagona、Fehmi Damkaci、James C. Fettinger、Lyle Isaacs
DOI:10.1021/ol991382k
日期:2000.3.1
The acid-catalyzed formation of methylene-bridged glycoluril dimers yields the C-2v-diastereomer selectively. Product resubmission experiments establish that the selectivity is the result of thermodynamic control. A modified synthetic route is presented that allows for the preparation of unsymmetrically substituted dimers, We present the X-ray crystal structures of both diastereomers, This class of compounds is useful for studies of self-assembly in aqueous solution.