Abstract
Conditions were found for the preparation of 2-ethoxyprop-2-enal dimethylhydrazone by reaction of 2-ethoxypropenal with N,N-dimethylhydrazine. 2-Ethoxyprop-2-enal dimethylhydrazone reacted with methyl vinyl ketone and methyl acrylate according to the [4 + 2]-cycloaddition pattern with regioselective formation of substituted tetrahydropyridines. The major product in the reaction of 2-ethoxyprop-2-enal dimethylhydrazone with 1,4-benzoquinone was 5-hydroxy-1-benzofuran-2-carbaldehyde dimethylhydrazone formed as a result of [3 + 2]-cycloaddition; a small amount of the corresponding [4 + 2]-cycloaddition product was also obtained. Some spontaneous transformations of the primary cycloaddition products were revealed.
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Original Russian Text © N.A. Keiko, T.A. Kuznetsova, L.I. Larina, Yu.A. Chuvashev, T.A. Klepikova, L.V. Sherstyannikova, 2006, published in Zhurnal Organicheskoi Khimii, 2006, Vol. 42, No. 10, pp. 1439–1443.
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Keiko, N.A., Kuznetsova, T.A., Larina, L.I. et al. Synthesis of 2-ethoxyprop-2-enal dimethylhydrazone and its Diels-Alder reactions. Russ J Org Chem 42, 1421–1425 (2006). https://doi.org/10.1134/S1070428006100010
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DOI: https://doi.org/10.1134/S1070428006100010