Experimental chemical shift correlation maps from heteronuclear two-dimensional NMR spectroscopy. 1. Carbon-13 and proton chemical shifts of raffinose and its subunits

Morris, Gareth A.; Hall, L. D.

doi:10.1021/ja00406a007

Cited by 121 publications

(33 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[3][4][5][6][7][8][9][10][11][12][13] In many cases the poor resolution of a spectrum can become a problem. That is why NMR spectroscopic analyses of larger glucose oligosaccharides than glucobioses can be very complicated, especially if the moieties are identical and are connected by the same types of linkages.…”

Section: Nmr Results and Discussionmentioning

confidence: 99%

“…Moreover, most of the published data available are contradictory. [3][4][5][6][7][8][9][10][11][12] Part of the published data is from selectively protected sugars, for example, sugars methylated at the anomeric center to hinder mutarotation and so enabling assignment of the a-and b-anomerically pure saccharides separately with less overlapping signals. The 13 C chemical shifts of some anomerically locked glucosyl glucosides have been determined using dynamic NMR, and they have also been compared with those of the monomer D D-glucose.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Roslund

Tähtinen

Niemitz

et al. 2008

Carbohydrate Research

209

119

View full text Add to dashboard Cite

Section: Nmr Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Roslund

Tähtinen

Niemitz

et al. 2008

Carbohydrate Research

209

119

View full text Add to dashboard Cite

“…The assignment of the resonances is based on the work by Morris and Hall. 15 We can see that the PREs for different carbons are fairly uniform. This indicates that the sugar molecule does not form an inner-sphere complex with 2, which is not really an unexpected result.…”

Section: Resultsmentioning

confidence: 87%

Nuclear spin relaxation study of aqueous raffinose solution in the presence of a gadolinium contrast agent

Ghalebani

Kruk

Kowalewski

2004

Magnetic Reson in Chemistry

View full text Add to dashboard Cite

Paramagnetic enhancement of nuclear spin-lattice relaxation rates (PREs) was measured in aqueous solution of the trisaccharide raffinose in the presence of a gadolinium(III) complex, GdDTPA-BMA, used as a magnetic resonance imaging contrast agent. The relaxation enhancement of aqueous protons was measured over a broad range of magnetic fields, using field-cycling apparatus in addition to conventional spectrometers. The nuclear magnetic relaxation dispersion profile thus obtained was interpreted with a recently developed model, allowing for both inner- and outer-sphere relaxation. The relaxation enhancement for the carbon-13 nuclei in raffinose was studied under high-resolution conditions at three magnetic fields, whereas the sugar proton PRE was measured at two fields. The PRE of the sugar nuclei could be interpreted in a consistent way, assuming that it was caused by the outer-sphere mechanism. The electron spin relaxation was found to be a less important source of modulation of the electron-nuclear dipole-dipole interaction than the mutual translational diffusion.

show abstract

“…To resolve this difficulty, recourse was made to 13C-'H correlation (HETCOR) spectroscopy (19). In this type of spectrum, cross peaks are observed for each carbon at the coordinates of the I3C chemical shift and the 'H chemical shift of the attached proton(s); thus, quaternary carbons are not observed in this type of spectrum.…”

Section: 'H Nmr Digitoxitzmentioning

confidence: 99%

Structural studies of digitoxin and related cardenolides by two-dimensional NMR

Drakenberg¹,

Brodelius²,

McIntyre³

et al. 1990

Can. J. Chem.

View full text Add to dashboard Cite

. J. Chem. 68, 272 (1990). The 'H and I3C NMR spectra of the cardenolides digitoxigenin, digoxigenin, digitoxin, and mono-and bis-digitoxigenin digitoxosides have been c6mpletely assigned by two-dimensional NMR spectroscopy. The techniques used include phasesensitive COSY, multiple relay COSY, and carbon-proton correlation (HETCOR and HMQC) spectra. Various aspects of the solution conformation of the steroid moiety of digitoxin and digoxigenin could be determined from coupling constants and NOE difference experiments and they are indicative of an all-chair conformation. The carbohydrate rings in digitoxin and the monoand bis-digitoxigenin digitoxosides are also in the chair conformation.

show abstract

Experimental chemical shift correlation maps from heteronuclear two-dimensional NMR spectroscopy. 1. Carbon-13 and proton chemical shifts of raffinose and its subunits

Cited by 121 publications

References 0 publications

Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Nuclear spin relaxation study of aqueous raffinose solution in the presence of a gadolinium contrast agent

Structural studies of digitoxin and related cardenolides by two-dimensional NMR

Contact Info

Product

Resources

About