𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Structure cristalline du 5H-pyrazolo[3,4-d]pyrimidine thione-4

✍ Scribed by Gadret, M. ;Goursolle, M. ;Leger, J. M.


Book ID
117858958
Publisher
International Union of Crystallography
Year
1974
Weight
385 KB
Volume
30
Category
Article
ISSN
0567-7408

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Analyses structurales et spectrales comp
✍ E. Perez-Ruiz; J. L. Delarbre; L. Maury; M. Selkti; A. Tomas 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 365 KB 👁 1 views

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

4-Benzylsulfanyl-1 H -pyrazolo[3,4- d ]p
✍ El Fal, Mohammed; Ramli, Youssef; Essassi, El Mokhtar; Saadi, Mohamed; El Ammari 📂 Article 📅 2013 🏛 International Union of Crystallography 🌐 English ⚖ 324 KB
A convenient synthesis of pyrazolo[3,4-d
✍ M. El Haddad; M. Soukri; S. Lazar; A. Bennamara; G. Guillaumet; M. Akssira 📂 Article 📅 2000 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 470 KB

## Abstract Pyrazolo‐[3,4‐__d__]pyrimidine‐4,6‐diones **5** and pyrazolo[4,3‐__d__]pyrimidine‐5,7‐diones **7** were synthesized by Curtius rearrangement of pyrazolic mono‐esters **2** and **3** followed by hetero‐cyclization __via__ the ureas derivatives **4** and **6** under alkaline conditions.