The synthesis and physiological activity of some novel 4-substituted triazolo [4,5-d]pyrimidines and 4-substituted pyrazolo [3,4-d]pyrimidines are described. Most of the compounds possessed high anticytokinin activity towards purine (benzyladenine) and phenylurea (4-PU-30) type cytokinins. 1-Benzyl-
โฆ LIBER โฆ
Aminoethyl derivatives of 4-substituted pyrazolo[3,4-d]pyrimidines
โ Scribed by T. S. Leonova; V. G. Yashunksii
- Book ID
- 112334452
- Publisher
- Springer US
- Year
- 1972
- Tongue
- English
- Weight
- 193 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0009-3122
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## Abstract Pyrazoloโ[3,4โ__d__]pyrimidineโ4,6โdiones **5** and pyrazolo[4,3โ__d__]pyrimidineโ5,7โdiones **7** were synthesized by Curtius rearrangement of pyrazolic monoโesters **2** and **3** followed by heteroโcyclization __via__ the ureas derivatives **4** and **6** under alkaline conditions.
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