不飽和脂肪酸メチルへの環状付加反応の研究 (第1報) : 共役オクタデカジエン酸メチルへのアクリル酸メチルの付加反応

概要

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The addition reactions of methyl acrylate to conjugated octadecadienoic acid methyl esters were studied by a kinetic method. The study shows that the addition is based on the Diels-Alder reaction between conjugated double bond with methyl acrylate. The rate constants as second order were determined in Table-3 for the addition reactions of methyl acrylate to trans-9, trans-11- and cis-9, trans-11-octadecadienoate at various temperature, respectively. The activation energy of the reactions was also determined in Table-3. From the results of the differences of rate constants, it has been found that trans, trans-conjugated octadecadienoate has about one hundred times greater activity as diene than cis, trans-conjugated octadecadienoate at 160°C. Futhermore, the adducts separated by column chromatograpy was observed to have a cyclohexene ring structure by IR, NMR, and Mass spectral analysis.
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