不飽和脂肪酸の加熱による構造変化に関する研究 (第2報) : 不均斉化反応に関する研究 (その2)

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A mixture of cyclic monomers were prepared from photo-isomerised tung oil under the condition of 295°C, 15min in a stainless autoclave. The mixture was separated by an inverted dry column packed with AgNO<SUB>3</SUB>-silica gel into 5, 6-disubstituted 1, 3-cyclohexadiene (A), 1, 6-disubstituted-1, 3-cyclohexadiene (B), 1, 2-disubstituted-1, 3-cyclohexadiene (C), 1, 6-disubstituted-1-cyclohexene (D) and o-substituted aromatic compounds (E). Then, these cyclic monomers were studied chemically and instrumentally in reference to the literature.<BR>It was found that the cyclic monomers first produced from the tung oil were A, and then A were isomerised by heating at 240°C to C via B.<BR>Further, C showed disproportionation reaction i.e., C changed into D and E by heating at 250°C for 5hr.
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