Anticytokinin activity of 4-substituted triazolo[4,5-d]pyrimidines and 4-substituted pyrazolo[3,4-d]pyrimidines |
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Authors: | V Alexieva I Sergiev E Karanov E Golovinsky E Stanoeva M Haimova G Petrov |
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Institution: | (1) Acad. M. Popov Institute of Plant Physiology, Bulgaria;(2) Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad., G. Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria;(3) Department of Chemistry, Sofia University St. Kl. Ohridsky,, J. Boucher Str., N: 1, Sofia, Bulgaria |
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Abstract: | The synthesis and physiological activity of some novel 4-substituted triazolo4,5-d]pyrimidines and 4-substituted pyrazolo3,4-d]pyrimidines are described. Most of the compounds possessed high anticytokinin activity towards purine (benzyladenine) and phenylurea (4-PU-30) type cytokinins. 1-Benzyl-4-ethoxycarbonylpiperazinyl-1H-1,2,3-triazolo4,5-d]pyrimidine almost completely removed cytokinin stimulated effects—betacyanin synthesis in Amaranthus caudatus cotyledons; growth of radish cotyledons and retention of chlorophyll in leaf explants. Some chemical structurephysiological activity relationships have been established. |
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