1H‐, 13C‐, and 15N‐NMR chemical shifts for selected glucosides and ribosides of aromatic cytokinins |
| |
| Authors: | Jan Vícha Michal Maloň Petra Veselá Otakar Humpa Miroslav Strnad Radek Marek |
| |
| Affiliation: | 1. National Center for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5/A4, CZ‐625 00 Brno, Czech Republic;2. Laboratory of Growth Regulators, Faculty of Science, Palacky University & Institute of Experimental Botany ASCR, ?lechtitel? 11, CZ‐783 71 Olomouc, Czech Republic |
| |
| Abstract: | The 1H and 13C 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, 15N NMR chemical shifts for selected derivatives were investigated by using 1H? 15N chemical shift correlation techniques. To map the influence of sugar moiety on the directly bonded nitrogen atom, selected N9‐glucosides and their ribose analogs were compared. Characteristic long‐range 1H? 15N coupling constants, measured by using 1H? 15N 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 © 2010 John Wiley & Sons, Ltd. |
| |
| Keywords: | NMR H‐1 C‐13 N‐15 1H?15N coupling constant plant hormone aromatic cytokinin purine glucoside riboside |
|
|
