[Synthesis and study of NMR spectra and conformations of branched oligosaccharides. 2,3-di-O-glycosylated methyl-alpha-L-rhamnopyranosides with one or two 2-acetamido-2-deoxy-beta-D-glucopyranosyl residues].
A series of methyl 2,3-di-O-glycosyl-alpha-L-rhamnopyranosides with 2-acetamido-2-deoxy-beta-D-glucopyranosyl substituents have been synthesized and the deviations from additivity (delta delta) in their 13C-NMR spectra determined. It is shown that the delta delta values for the trisaccharides with the GlcNAc substituent at O-2 of the diglycosylated Rha may markedly differ from the delta delta values in the spectra of the respective trisaccharides with the Glc substituent. These deviations are probably associated with the intramolecular spatial interactions with participation of the NHAc-group.
Nifantĕv
N E
NE
Shashkov
A S
AS
Khatuntseva
E A
EA
Tsvetkov
Iu E
IuE
Sherman
A A
AA
Kochetkov
N K
NK
D000117:Acetylglucosamine / Q000031:analogs & derivatives*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry*; D006031:Glycosylation; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D012210:Rhamnose / Q000031:analogs & derivatives* / Q000737:chemistry
D006027:Glycosides; C088555:methyl rhamnopyranoside; D012210:Rhamnose; D000117:Acetylglucosamine
Sintez i issledovanie spektrov IaMR i konformatsiĭ razvetvlennykh oligosakharidov. 2,3-Di-O-glikozilirovannye metil-alpha-L-ramnopiranozidy s odnim ili dvumia 2-atsetamido-2-dezoksi-beta-D-gliukopiranozil'nymi ostatkami.