Oxidative cyclocondensation of cyclic thio(seleno)ureas. 4. Electronic effects of the substituents and the medium |
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| Authors: | N. I. Mukarramov B. A. Urakov Kh. M. Shakhidoyatov |
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| Affiliation: | (1) Academician S. Yu. Yunusov Institute of Plant Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, 700170 |
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| Abstract: | We have studied the electronic effect of substituents, steric factors, the medium, and the nature of the oxidizing agent on oxidative cyclocondensation of 2-thioxo-4-quinazolone and its substituted derivatives. We have found that electron-donor substituents promote the reaction while electronacceptor substituents inhibit the reaction. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 616–622, April, 2006. |
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| Keywords: | 8H,15H-1,2,4-thiadiazolo[3,2-b:5,4-b′ ]diquinazoline-8,15-dione 2-thioxo-4-quinazolone quinazoline-2,4-dione oxidative cyclocondensation electronic substituent effects |
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