Chemical and Pharmaceutical Bulletin p. 1937 - 1939 (1992)
Update date:2022-07-30
Topics:
Evidente
Piccialli
Sisto
Ohba
Honda
Fujii
cis-Zeatin (3a) and its 9-(2-deoxy-β-D-ribofuranosyl) derivative (3c) have been synthesized from N-[(1,1-dimethylethoxy)carbonyl]glycine methyl ester (5) in 5 steps by adopting the 'α-amino aldehyde/olefination' technology. The new cis-zeatin derivative (3c), its trans isomer (1c), and known trans-zeatin 9-β-D-riboside (1b) were tested for cytokinin activity in the stimulation of chlorophyll biosynthesis in etiolated cucumber cotyledons. The ribeside 1b turned out to be the most active cytokinin among them, while the deoxyribosides 1c and 3c showed a marked decrease and a total loss, respectively, of cytokinin activity.
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