Imine-enamine tautomerism of dihydroazolopyrimidines. 3. 5-Aryl-substituted 4,7(6,7)-dihydro-1,2,4-triazolo[1,5-a]pyrimidines |
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Authors: | S M Desenko V D Orlov V V Lipson O V Shishkin S V Lindeman Yu T Struchkov |
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Institution: | (1) A. M. Gor'kii Kharkov State University, 310077 Kharkov;(2) A. N. Nesmeyanov Institute of Heteroorganic Compounds, Russian Academy of Sciences, 117813 Moscow |
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Abstract: | 5-Aryl-substituted 4,7(6,7)-dihydro-1,2,4-triazolo1,5-a]pyrimidines were obtained by condensation of 3-amino-1,2,4-triazole with -dimethylaminopropiophenone hydrochlorides or crotophenone. The effect of steric and electronic factors on the position of the imine-enamine equilibrium in solutions of the synthesized substances is examined. 5-Phenyl-4,7-dihydro-1,2,4-triazolo1,5-a]pyriniidine was subjected to x-ray diffraction analysis.See 1] for Communication 2.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1539–1544, November, 1991. |
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