Noch einmal: 2D-NMR: Two-Dimensional NMR Methods for Esblishing Molecular Connectivity. Von G. E. Martin und A.S. Zektzer. VCH Verlagsgesellschaft Weinheim - New York 1988. 508 S., 245 Abb., 48 Tab., DM 126,-. ISBN 3-527-26858-8

1989 ◽  
Vol 37 (6) ◽  
pp. 612-615
Author(s):  
S. Berger
Keyword(s):  
New York ◽  
2D Nmr ◽  
Two Dimensional ◽  
Molecular Connectivity ◽  
Nmr Methods

Experimental chemical shift correlation maps from heteronuclear two-dimensional nuclear magnetic resonance spectroscopy. II: Carbon-13 and proton chemical shifts of a-D-glucopyranose oligomers

1982 ◽  
Vol 60 (19) ◽  
pp. 2431-2441 ◽  
Author(s):  
Gareth A. Morris ◽  
Laurance D. Hall
Keyword(s):  
Chemical Shifts ◽  
2D Nmr ◽  
Resonance Spectroscopy ◽  
Two Dimensional ◽  
Chemical Shift Correlation ◽  
Proton Pair ◽  
Double Fourier Transform ◽  
Nmr Methods ◽  
Proton Chemical Shifts ◽  
Experimental Chemical Shift

Double Fourier transform ("2D") nmr methods allow the simultaneous measurement of proton and carbon-13 chemical shifts for each directly bonded carbon–proton pair in a molecule. As well as greatly increasing the number of different resonances that may be distinguished in the spectra of complex systems, the measurement of correlated proton and carbon-13 shifts allows the otherwise inaccessible proton shifts to be determined, and facilitates the assignment of conventional proton and carbon-13 spectra. Results are presented for glucose, maltose, maltotriose, α-cyclodextrin, β-cyclodextrin, and dextran T-10; reassignments are proposed for the carbon-13 spectra of maltose and maltotriose.

Characterization, by two-dimensional NMR spectroscopy, of a complex tetrasaccharide glycoside isolated from Ipomoeastans

1992 ◽  
Vol 70 (3) ◽  
pp. 1000-1008 ◽  
Author(s):  
Raul G. Enriquez ◽  
Ismael Leon ◽  
Fidel Perez ◽  
Fernando Walls ◽  
Katherine A. Carpenter ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Short Chain Fatty Acids ◽  
2D Nmr ◽  
Two Dimensional ◽  
Hplc Separation ◽  
Butanoic Acid ◽  
Single Compound ◽  
Anomeric Carbon ◽  
Basic Hydrolysis ◽  
Nmr Methods

A mixture of glycosidic acids, each of which consisted of a tetrasaccharide unit linked by an anomeric carbon to 11-hydroxypalmitic acid and containing short-chain fatty acids ester-linked to the sugar units, was isolated from Ipomoeastans. Basic hydrolysis allowed isolation of a single compound whose structure was determined by two-dimensional NMR methods to be (S)-11-hydroxypalmitic acid 11-O-β-quinovopyranosyl-(1-4)-α-rhamnopyranosyl-(1,2)-β-glycopyranosyl-(1-2)-β-quinovopyranoside. Further HPLC separation of the original mixture allowed separation of a compound that was shown, by 2D NMR, to have 2-mefhylbutanoic acid molecules linked to C-4 of the terminal quinovose and C-2 of rhamnose, 3-hydroxy-2-methyl butanoic acid linked to C-6 of glucose, and with the palmitic acid forming a lactone at C-3 of rhamnose. Closer inspection revealed that this compound was actually a mixture of diastereomers involving different ((2R,3R) and (2S,3S)) enantiomers of 3-hydroxy-2-methylbutanoic acid bonded to the chiral tetrasaccharide core. Keywords: tetrasaccharide, two-dimensional NMR.

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