Interaction of 2-bromo-7-methyl-5-oxo-5H-1,3,4-thiadiazolo[3,2-α]pyrimidine with methylene-active compounds and acid hydrolysis of its products |
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| Authors: | S. S. Shukurov M. A. Kukaniev I. M. Nasyrov K. S. Zakharo R. A. Karakhanov |
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| Affiliation: | (1) Institute of Chemistry, Tadjikistan Academy of Sciences, ul. Aini 299, 734063 Dushanbe, Tadjikistan;(2) I.M.Gubkin National Academy of Oil and Gas, 65 Leninsky prosp., 117917 Moscow, Russian Federation |
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| Abstract: | Reactions of 2-bromo-7-methyl-5-oxo-5H-1,3,4-thiadiazolo[3,2-a]pyrimidine with sodium derivatives of pentane-2,4-dione, malonodinitrile, Meldrum acid, acetoacetic, cyanoacetic and malonic esters have been shown to give the respective substituted derivatives. Azinyl-ylidene tautomerism has been found to be characteristic of these compounds, the latter existing mainly in the ylidene form. The acid hydrolysis of pentane-2, 5-dione and cyanoacetic and malonic esters derivatives has been investigated.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1957–1961, November, 1993 |
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| Keywords: | nucleophilic substitution reaction 2-bromo-7-methyl-5-oxo-5H-1,3,4-thiadiazolo[3,2-a]pyrimidine methylene active compounds (pentane-2, 5-dione, malonodinitrile, Meldrum acid, acetoacetic, cyanoacetic, malonic esters) azinyl-ylidene tautomerism ketonic and acidic cleavage |
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