Condensation of the triad system with carbonyl compounds,1

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  • Condensation of the triad system with carbonyl compounds , 1

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<jats:title>Abstract</jats:title> <jats:p>In the presence of sodium ethoxide, ethyl itaconate condensed with ketones (acetone and cyclohexanone) at the terminal carbon atoms of its triad system without any appreciable isomerisation and afforded novel compounds, α-methyl-γ,γ-disubstituted aconic acids (C) and α-alkylidenemethyl-γ,γ-disubstituted aconic acids (D).</jats:p> <jats:p>(Remark: Graphics omitted.)</jats:p> <jats:p>The chemical structures of C and D were determined by ultraviolet, infrared, NMR spectra etc.</jats:p> <jats:p>A reaction mechanism has been proposed (p. 1197).</jats:p>

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