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A novel rearrangement of 3-cyanopyrazolo[1,5-a]pyrimidine to a pyrazolo[3,4-d]pyrimidine

โœ Scribed by Thomas Novinson; Roland K. Robins; Darrell E. O'Brien


Book ID
112123054
Publisher
Journal of Heterocyclic Chemistry
Year
1973
Tongue
English
Weight
55 KB
Volume
10
Category
Article
ISSN
0022-152X

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๐Ÿ“œ SIMILAR VOLUMES


Pyrazolo[3,4-d][1,2,3]triazolo[1,5-a]pyr
โœ Antonino Lauria; Ilenia Abbate; Chiara Patella; Noemi Gambino; Arturo Silvestri; ๐Ÿ“‚ Article ๐Ÿ“… 2008 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 300 KB

Derivatives of the new ring system pyrazolo [3,4-d][1,2,3]triazolo[1,5-a]pyrimidine were synthesized from the corresponding angular isomers, through a Dimroth rearrangement, in quantitative yields. Preliminary computational studies demonstrated that this class of compounds could be a good candidate

A convenient synthesis of pyrazolo[3,4-d
โœ M. El Haddad; M. Soukri; S. Lazar; A. Bennamara; G. Guillaumet; M. Akssira ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Journal of Heterocyclic Chemistry ๐ŸŒ English โš– 470 KB

## Abstract Pyrazoloโ€[3,4โ€__d__]pyrimidineโ€4,6โ€diones **5** and pyrazolo[4,3โ€__d__]pyrimidineโ€5,7โ€diones **7** were synthesized by Curtius rearrangement of pyrazolic monoโ€esters **2** and **3** followed by heteroโ€cyclization __via__ the ureas derivatives **4** and **6** under alkaline conditions.