53853-00-2Relevant articles and documents
Formation of 5-oxo-5,6,7,8-tetrahydrochromenylium and -thiochromenylium salts from triketones of the 2-(3-oxopropyl)cyclohexane-1,3-dione series
Markova,Korobochkina,Serdyukova,Kharchenko
, p. 1032 - 1038 (2007/10/03)
We have worked out the optimal conditions for synthesis of 2,.-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.
