Nobuaki Kambe, Professor, and Takanori Iwasaki, Assistant Professor, at the Graduate School of Engineering, Osaka University developed a synthetic method by constructing carbon frameworks of 8 carbons through the formation of a bond of two butadiene molecules by using
a cheap nickel catalyst and introducing an alkyl group and a benzene ring to an internal and terminal carbons of 1,6 - octadiene, respectively.