Alternative routes for the genesis of kinetin: A synthetic intramolecular route from 2′-deoxyadenosine to kinetin

Add time:08/07/2019    Source:sciencedirect.com

We have tested the possible genesis of kinetin from a 2′-deoxyadenylate unit of DNA by a chemical route involving a head-to-tail transfer of deoxyribose from the 9 to the 3 position of the adenine nucleus via a cyclonucleoside, with subsequent elimination of 1′- and 3′-polar groups and 3 → N6 intramolecular rearrangement leading to kinetin. We have also determined quantitatively the per cent conversions to 3-furfuryladenine and/or kinetin of the following under autoclaving conditions at 120°, pH 4, 2 atm, and 4 hr: (1) adenine/furfury alcohol; (2) adenine/2-deoxy-d-ribose; (3) 2′-deoxyadenosine; (4) 3-furfuryladenine; (5) 3,5′-(3′-O-diethylphosphoryl-2′-deoxya-denosine)-cyclonucleoside p-toluenesulfonate. The sequence of reactions involving cyclonucleoside formation and rearrangement has been shown to be a chemically feasible route by which kinetin can be formed, although it is not the only way this cytokinin can be generated.

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