Abstract
This unit describes an effective method for the preparation of natural cytokinins and their synthetic derivatives based on enzymatic cleavage of the N-glycosidic bond of N6 -substituted adenosine or O6 -substituted inosine derivatives in the presence of purine nucleoside phosphorylase (PNP) and Na2 HAsO4 . The arsenolysis reaction is irreversible due to the hydrolysis of the resulting α-D-ribose-1-arsenate. As a result, the desired products are formed in near-quantitative yields, as indicated by high-performance liquid chromatography (HPLC) analysis, and can easily be isolated. In the strategy used here, the ribose residue acts as a protective group. © 2018 by John Wiley & Sons, Inc.
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