title: The 13C-N.M.R. spectra of disaccharides of D-glucose, D-galactose, and L-rhamnose as models for immunological polysaccharides.
abstract: Complete assignments of the 13C-n.m.r. spectra of disaccharides having beta-glycosidic linkages are presented and discussed. The disaccharides of D-glucose, D-galactose, L-rhamnose, 2-acetamido-2-deoxy-D-glucose, and 2-acetamido-2-deoxy-D-galactose are model compounds for 13C-n.m.r. studies of immunological polysaccharides. Changing the nature of the reducing glucopyranose rings (D-glucose to L-rhamnose) has no important influence on the chemical shifts of the carbons of the non-reducing glucopyranose ring (D-glucose). The converse is also true: the chemical shifts of the carbons of the reducing glucopyranose ring (L-rhamnose) are not noticeably affected by a change of the non-reducing unit (D-glucose to D-galactose or 2-acetamido-2-deoxy-D-glucose).
mesh_terms: D004187:Disaccharides; D005690:Galactose; D005947:Glucose; D009682:Magnetic Resonance Spectroscopy; D008954:Models, Biological; D008968:Molecular Conformation; D011134:Polysaccharides / Q000276:immunology*; D012210:Rhamnose; D013329:Structure-Activity Relationship
chemical_list: D004187:Disaccharides; D011134:Polysaccharides; D005947:Glucose; D012210:Rhamnose; D005690:Galactose