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Imine-enamine tautomerism of dihydroazolopyrimidines. 3. 5-Aryl-substituted 4,7(6,7)-dihydro-1,2,4-triazolo[1,5-a]pyrimidines

✍ Scribed by S. M. Desenko; V. D. Orlov; V. V. Lipson; O. V. Shishkin; S. V. Lindeman; Yu. T. Struchkov

Publisher: Springer US
Year: 1991
Tongue: English
Weight: 399 KB
Volume: 27
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00471754

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## 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