Enantioselective Solid–Liquid Extraction of Native Saccharides with Chiral BINOL-Based Pyridine–Phenol Type Macrocycles

A chiral 1,1'-bi-2-naphthol (BINOL)-containing pyridine-acetylene-phenol macrocycle and a pyridine-BINOL alternating macrocycle were developed for enantioselective recognition of saccharides. In solid-liquid extraction of native saccharides, these macrocycles selectively extracted one enantiomer from each of a racemic mixture of d/l-fructose, d/l-glucose, and d/l-mannose into a lipophilic solvent. This is the first example in which native saccharides, especially such important hexoses, were enantioselectively extracted with artificial host molecules.