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NMR analysis of a series of substituted pyrazolo[3,4-d] pyrimidines-4-amines

✍ Scribed by Lígia M. Rodrigues; Aravind Sivasubramanian; Elisa M. Pinto; Ana M. F. Oliveira-Campos; Julio A. Seijas; M. Pilar Vázquez-Tato

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
72 KB
Volume
47
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A series of 21 substituted pyrazolo[3,4‐d]pyrimidines‐4‐amines were studied by ^1^H and ^13^C NMR. The application of two‐dimensional techniques, HMQC and HMBC, allowed the complete assignment of the spectra for all the compounds. Copyright © 2008 John Wiley & Sons, Ltd.

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A convenient synthesis of pyrazolo[3,4-d
A convenient synthesis of pyrazolo[3,4-d]pyrimidine-4,6-dione and pyrazolo[4,3-d]pyrimidine-5,7-dione derivatives
✍ 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.

ChemInform Abstract: A Convenient Synthe
ChemInform Abstract: A Convenient Synthesis of Pyrazolo[3,4-d]pyrimidine-4,6-dione and Pyrazolo[4,3-d]pyrimidine-5,7-dione Derivatives.
✍ M. El Haddad; M. Soukri; S. Lazar; A. Bennamara; G. Guillaumet; M. Akssira 📂 Article 📅 2001 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v