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Synthesis and crystal structure of 1-phenyl-3-methylthio-4-imino-5-allyl-pyrazolo[3,4-d]pyrimidine

โœ Scribed by Weiqiang Chen; Linhong Weng; Guiyu Jin


Book ID
110275436
Publisher
Springer
Year
1999
Tongue
English
Weight
56 KB
Volume
29
Category
Article
ISSN
1572-8854

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๐Ÿ“œ SIMILAR VOLUMES


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.

Methyl (4-oxo-1-phenyl-4,5-dihydro-1H-py
โœ Yathirajan, H. S. ;Bindya, S. ;Sarojini, B. K. ;Narayana, B. ;Bolte, Michael ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› International Union of Crystallography ๐ŸŒ English โš– 501 KB

The title compound, C 14 H 12 N 4 O 3 , a pyrazolopyrimidine derivative, displays normal geometrical parameters. The dihedral angle between the mean planes of the pyrazolopyrimidine unit and the phenyl ring is 26.14 (4) . The non-H atoms of the ester side chain are coplanar (r.m.s. deviation = 0.009

Ethyl (4-oxo-1-phenyl-1,4-dihydro-5H-pyr
โœ Yathirajan, H. S. ;Bindya, S. ;Sarojini, B. K. ;Narayana, B. ;Bolte, Michael ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› International Union of Crystallography ๐ŸŒ English โš– 372 KB

Geometric parameters of the title compound, C 14 H 12 N 4 O 3 , a pyrazolopyrimidine derivative, are in the usual ranges. The dihedral angle between the pyrazolopyrimidine system and the phenyl ring is 4.64 (5) . The non-H atoms of the ester side chain lie in a common plane (r.m.s. deviation = 0.028