Reactions of 2-benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxide with CH acids |
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| Authors: | V. M. Berestovitskaya M. V. Selivanova M. I. Vakulenko I. E. Efremova G. A. Berkova |
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| Affiliation: | 1.Hertzen Russian State Pedagogical University,St. Petersburg,Russia |
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| Abstract: | 2-Benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxide reacted with acyclic CH acids (acetylacetone, diethyl malonate, and its derivatives) according to the 1,4-addition pattern, whereas reactions of the title compound with cyclohexane-1,3-dione and 5,5-dimethylcyclohexane-1,3-dione (dimedone) were complicated by subsequent intramolecular heterocyclization leading to thieno[3,2-b]chromene derivatives. |
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