ISSN:
0030-4921
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Two techniques were investigated for assigning the 29Si n.m.r. spectra of trimethylsilylated sugars. Specific deuteration, together with selective proton decoupling experiments, has allowed the complete assignment for methyl 2,3,4,6-tetra-O-trimethylsilyl-α-D-glucopyranoside. Double resonance spectra obtained in the presence of a lanthanide shift reagent, Pr(dpm)3, have enabled the 29Si and 1H signals for the -SiMe3, groups of methyl 2,3,4-tri-O-trimethylsilyl-α-D-glucopyranoside, to be linked. A complete and unambiguous assignment of the 29Si spectrum for this molecule was obtained by selective deuteration, thus giving an unequivocal assignment of the -SiMe3 proton resonances also. Definitive data regarding the effects of Pr(dpm)3 on the 29Si and 1H resonances of the various -SiMe3 groups of methyl 2,3,4-tri-O-trimethylsilyl-α-D-glucopyranoside are therefore available.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1270090713
Permalink