Journal ArticleDOI
Nuclear Magnetic Resonance Spectroscopy. Carbon-13 Spectra of Some Inositols and Their O-Methylated Derivatives
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In this paper, the C nmr spectra of some inositols and their partially O-methylated derivatives are tabulated and discussed, and a system of empirical constants which can be used to estimate the spectral properties of the carbons of these ring systems is derived.Abstract:
The ^(13)C nmr spectra of some inositols and their partially O-methylated derivatives are tabulated and
discussed. Methods of assignment are detailed. A system of empirical constants which can be used to estimate
the spectra of the carbons of these ring systems is derived. The substituent effects are noted to conform generally to the notion that steric or proximity effects are very important sources of chemical-shift differences in these systems.read more
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Journal ArticleDOI
Carbon-13 nmr spectroscopy of tetrapyrroles*
N. A. Matwiyoff,Bruce F. Burnham +1 more
TL;DR: In the present study, chlorophylls a and b uniformly labeled with I3C, and coproporphyrin 111 specifically labeled with 13C are prepared and the proton-noise decoupled CMR spectra have been obtained and interpreted for position assignment.
Journal ArticleDOI
Synthesis of allo- and epi-inositol via the NHC-catalyzed carbocyclization of carbohydrate-derived dialdehydes.
TL;DR: A synthesis of carbocyclic sugars from carbohydrate-derived dialdehydes using organocatalysis has been developed and stereospecifically reduced using sodium borohydride and deprotected to give allo- and epi-inositol in good yield that confirmed the structural and stereochemical assignments.
Journal ArticleDOI
Untersuchung der 13c-kernresonanz-spektren der acht isomeren 1,6-anhydro-β-D-hexopyranosen
TL;DR: In this article, the signals of the 13C-n.m.r. spectra of the 8 isomeric 1,6-anhydro-β-D -hexopyranoses having the 1C4 conformation were assigned by comparison with the spectrum of selectively deuterated derivatives and by observation of the substituent effect of the O-isopropylidene derivatives.
Journal ArticleDOI
Multinuclear magnetic resonance studies of boar seminal plasma
Günter Kamp,Jürgen Lauterwein +1 more
TL;DR: Multinuclear magnetic resonance studies were performed on aqueous solutions of lyophilisates of boar seminal plasma and confirmed the presence of GPC and revealed phosphorylcholine, glycerophosphorylserine and glycerophilelethanolamine as further components.