Tautomeric forms of 5-(2-hydroxyphenyl)-7-phenyldihydro-1,2,4-triazolo[1,5-a]pyrimidine
โ Scribed by S. M. Desenko; V. D. Orlov
- Publisher
- Springer US
- Year
- 1989
- Tongue
- English
- Weight
- 66 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0009-3122
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract magnified image The 7โarylโ4,7โdihydro[1,2,4]triazolo[1,5โ__a__]pyrimidines **1a**, **1b**, **1c** can undergo addition of hydrazine to the enamine double bond leading to hydrazine derivatives of tetrahydrotriazolopyrimidines **2a**, **2b**, **2c**; the process is usually accompanied by
## Abstract magnified image The condensation of 5โaminoโ4โphenylโ1,2,3โtriazole (**1**) with chalcones **2aโe** or 3โdimethylaminoโpropiophenone (**4f**) leads to the 6,7โdihydroโ(1,2,3)โtriazolo[1,5โ__a__]pyrimidines **3aโf.** The equilibrium of **3** and the tautomeric 4,7โdihydroโ(1,2,3)โtriazo