An Enantiomerically Pure Propeller-Shaped Supramolecular Capsule Based on the Stereospecific Self-Assembly of Two Chiral Tris(oxazoline) Ligands around Three AgIIons
C-3-Symmetric tris(oxazoline) derivatives (2S,2R) were designed to complex sugars and alcohols in nonpolar organic solvent through complementary intermolecular hydrogen-bonding interactions. H-1 NMR titration demonstrated that the C-3-symmetric hosts were capable of anomer-selective recognition for n-octyl-D-glucopyranoside. H-1 NMR data revealed intermolecular hydrogen bonds between 2S and glucopyranosides. (C) 2001 Elsevier Science Ltd. All rights reserved.