Journal
MAGNETIC RESONANCE IN CHEMISTRY
Volume 48, Issue 4, Pages 318-322Publisher
WILEY-BLACKWELL
DOI: 10.1002/mrc.2575
Keywords
NMR; H-1; C-13; N-15; H-1-N-15 coupling constant; plant hormone; aromatic cytokinin; purine; glucoside; riboside
Funding
- Olchemim Ltd.
- Czech Ministry of Education, Youth and Sports [MSM0021622413, LC06030, MSM6198959216]
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The H-1 and C-13 NMR resonances of 16 purine glucosides were assigned by a combination of one- and two-dimensional NMR experiments, including gs-COSY, gs-HSQC, and gs-HMBC, in order to characterize the effect of substituent and the position of glucose unit on the NMR chemical shifts. In addition, N-15 NMR chemical shifts for selected derivatives were investigated by using H-1-N-15 chemical shift correlation techniques. To map the influence of sugar moiety on the directly bonded nitrogen atom, selected N-9-glucosides and their ribose analogs were compared. Characteristic long-range H-1-N-15 coupling constants, measured by using H-1-N-15 gradient-selected single-quantum multiple bond correlation (GSQMBC), are also reported and discussed. All compounds investigated here belong to cytokinins, an important group of plant hormones. Copyright (C) 2010 John Wiley & Sons, Ltd.
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