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Reactions of 2-(trifluoromethyl)chromones with cyanoacetamides, ethyl cyanoacetate and diethyl malonate. Unexpected synthesis of benzo[c]coumarin derivatives |
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| Authors: | Vyacheslav Ya Sosnovskikh Alexander V SafryginViktor A Anufriev Oleg S EltsovViktor O Iaroshenko |
| Institution: | a Department of Chemistry, Ural State University, pr. Lenina 51, 620083 Ekaterinburg, Russia b Department of Chemistry, Ural Federal University, St. Mira 19, 620002 Ekaterinburg, Russia c Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany |
| Abstract: | While 2-(trifluoromethyl)chromones react with cyanoacetamides in the presence of sodium ethoxide to produce 6-(2-hydroxyaryl)-4-(trifluoromethyl)-2-oxo-1,2-dihydropyridine-3-carbonitriles, their reactions with ethyl cyanoacetate and diethyl malonate under the same conditions took an entirely different course and gave novel functionalized derivatives of 6H-benzoc]chromen-6-one. |
| Keywords: | Chromones Active methylene compounds 2-Pyridones 6H-Benzo[c]chromen-6-one Trifluoromethylated heterocycles |
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