Sur l'acylation et l'alkylation de l'amino-4 pyrazolo [3,4-d] pyrimidine
✍ Scribed by M. El Hedi Jellali; Nguyen Van Bac; N. Dat-Xuong
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 355 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4020
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📜 SIMILAR VOLUMES
The molecular structure of the protonated form of tisopurine, 4-thioxo-2,5H,7H '-pyrazolo [ 3,4-d ] pyrimidinium chloride, (TPH'Cl-), was determined by x-ray di †raction methods. The crystals are monoclinic, C 5 H 5 N 4 SCl space group with a = 7.332(5), b = 10.911(9) and c = 9.423(8) b = 104.99(6)Ä
The thermal decomposition of phenyl carbazate results in formation of 4-amino urazole. The same compound is formed in reactions which according to other authors yield p-urazine. This six-membered cyclic isomer could not be prepared. The structure of 4-amino urazole is confirmed by study of infrared