The study of reactions of 7-substituted 8-hydrazino-3-methylxanthine with β-dicarbonyl compounds
The problem of searching biologically active compounds amidst xanthine derivatives is a crucial one and is an issue for long-term investigation. The aim of this paper was to study reactions of 7-substituted 8-hydrazino-3methylxanthine with acetylacetone and acetoacetic ether. Methods and results. Re...
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Zaporozhye State Medical University,
2015-08-01T00:00:00Z.
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| Zusammenfassung: | The problem of searching biologically active compounds amidst xanthine derivatives is a crucial one and is an issue for long-term investigation. The aim of this paper was to study reactions of 7-substituted 8-hydrazino-3methylxanthine with acetylacetone and acetoacetic ether. Methods and results. Reaction of 7-substituted 8-hydrazinoxanthines together with acetylacetone is performed by way of forming the respective 7-substituted 8-(3,4-dimethylpyrazole-1-yl)-3-methylxanthines. Interaction of hydrazinoxanthines with the excess of acetoacetic ether proceeds with the formation of 8-(3,4-dimethyl-6-oxopyrano[2,3-s]pyrazol-1-yl)xanthines. Conclusion. The investigated spectral characteristics of synthesized compounds indicate of relevance of IR-, NMR- and mass spectra to the proposed structure -(3,4-dimethyl-6-oxopyrano[2,3-s]pyrazol-1-yl)xanthines and 7-substituted 8-(3,4-dimethylpyrazole-1-yl)-3-methylxanthine. |
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| Beschreibung: | 10.14739/2409-2932.2015.2.45125 2306-8094 2409-2932 |