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- Title
J(<sup>77</sup>Se,¹H) and J(<sup>77</sup>Se,<sup>13</sup>C) couplings of seleno-carbohydrates obtained by <sup>77</sup>Se satellite 1D <sup>13</sup>C spectroscopy and <sup>77</sup>Se selective HR-HMBC spectroscopy.
- Authors
Jun Uzawa; Junpei Shimabukuro; Tatsuya Suzuki; Akihiro Imamura; Hideharu Ishida; Hiromune Ando; Yoshiki Yamaguchi
- Abstract
Seleno-carbohydrates are those in which the oxygen of the glycosidic bond or the hydroxyl group is artificially replaced with selenium. This substitution changes ¹H and 13C chemical shifts and produces spin coupling constants involving 77Se. Coupling constants, such as 2-3J(77Se, ¹H), are likely to be useful for conformational analyses of glycans because such couplings are never observed in natural glycans. Several papers have discussed the relationship between 2-3J(77Se, ¹H) and conformation; however, only few reports describe 1-3J(77Se, 13C), which could also be useful. Here, we obtain 77Se coupling constants of seleno-carbohydrates from 77Se-selective HR-HMBC and 77Se satellites in 1D 13C spectra and examine their conformations using the Newman projection scheme.
- Subjects
SELENOPROTEINS; HYDROXYL group; CHEMICAL shift (Nuclear magnetic resonance); RESONANCE frequency analysis; HETERONUCLEAR diatomic molecules
- Publication
Magnetic Resonance in Chemistry, 2018, Vol 56, Issue 9, p836
- ISSN
0749-1581
- Publication type
Article
- DOI
10.1002/mrc.4746