1975 年 24 巻 6 号 p. 371-376
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 AgNO3-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.
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.
Further, C showed disproportionation reaction i.e., C changed into D and E by heating at 250°C for 5hr.