[CH2:1]=[CH:2][C:3](=[CH2:5])[CH3:4].[C:6]([O:12][CH:13]=[CH2:14])(=[O:11])[C:7]([CH3:10])([CH3:9])[CH3:8].O>CO.[O-]S(C(F)(F)F)(=O)=O.[Ag+]>[C:6]([O:12][CH:13]=[CH:14][CH2:4][CH:3]([CH3:5])[CH:2]=[CH2:1])(=[O:11])[C:7]([CH3:10])([CH3:9])[CH3:8](Benzene)ruthenium dichloride dimer (14 mg, 0.056 mmol Ru), silver triflate (20 mg, 0.078 mmol) and 2,2-methylenebis(4-phenyl-2-oxazoline) (17.8 mg, 0.058 mmol) were dissolved in 2 ml of methanol. To the mixed solution were added isoprene (2 ml) and vinyl pivalate (1 ml) and the mixture was stirred under heat at 100° C. for 10 hours. The resulting product was poured into water and the separated organic layer was subjected to a GLC analysis. As a result, it was confirmed that a co-dimer was produced with the conversion rate being 72% and the ratio of an isomer being 4:1.
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