Molecular structure and tautomeric conversions of 5-(4-dimethylaminophenyl)-7-phenyl-6,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidine
✍ Scribed by S. M. Desenko; V. D. Orlov; O. V. Shishkin; V. V. Lipson; S. V. Lindeman; Yu. T. Struchkov
- Publisher
- Springer US
- Year
- 1992
- Tongue
- English
- Weight
- 205 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0009-3122
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract magnified image The 7‐aryl‐4,7‐dihydro[1,2,4]triazolo[1,5‐__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 5‐amino‐4‐phenyl‐1,2,3‐triazole (**1**) with chalcones **2a‐e** or 3‐dimethylamino‐propiophenone (**4f**) leads to the 6,7‐dihydro‐(1,2,3)‐triazolo[1,5‐__a__]pyrimidines **3a‐f.** The equilibrium of **3** and the tautomeric 4,7‐dihydro‐(1,2,3)‐triazo
## Abstract The cyclocondensation of 6‐acetyl‐4,7‐dihydro‐5‐methyl‐7‐phenyl[1,2,4]triazolo[1,5‐__a__]pyrimidine (3) with hydroxylamine or hydrazine leads to 3a,4,9,9a‐tetrahydro‐3,9a‐dimethyl‐4‐phenylisoxazolo‐[5,4‐__d__][1,2,4]triazolo[1,5‐__a__]pyrimidine (4a) and 3a,4,9,9a‐tetrahydro‐3,9a‐dimeth