Tetrahydrochromenylium and -Thiochromenylium Salts from Triketones of the 2-(3-Oxopropyl)cyclohexane-1,3-dione Series |
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Authors: | L I Markova N G Korobochkina T N Serdyukova V G Kharchenko |
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Institution: | (1) N. G. Chernyshevsky Saratov State University, 410026 Saratov, Russia;(2) Scientific-Research Institute of Chemistry, Saratov State University, 410026 Saratov, Russia |
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Abstract: | We have worked out the optimal conditions for synthesis of 2,4-diaryl-5-oxo-5,6,7,8-tetrahydrochromenylium and -thiochromenylium salts based on triketones of the 2-(1,3-diaryl-3-oxopropyl)cyclohexane-1,3-dione series. For the first time, along with 5-oxo-substituted salts, we have obtained 5-thioxo-5,6,7,8-tetrahydrothiochromenylium salts. A necessary condition for the formation of the latter on treatment with acids and S-nucleophiles is the presence of electron-donor groups on the aryl substituents of the indicated triketones. |
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Keywords: | 2-(1 3-diaryl-3-oxopropyl)cyclohexane-1 3-diones 5 6 7 8-tetrahydrochromenylium salts |
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