| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for hydrogenating a polyene by which the reaction can be carried out without using a large amount of expensive catalyst and without using a solvent or at least by using the solvent in the minimum amount with extremely high yield from quantitative conversion by carrying out the hydrogenation in the presence of a carboxylic acid. SOLUTION: The hydrogenation is carried out in the presence of (C) a carboxylic acid when hydrogenating (B) a polyene to a corresponding monoene by using (A) a homogeneous system of a ruthenium catalyst. Preferably, the component A is generated in situ in the presence of CO or formaldehyde, and the hydrogenation is carried out in the presence of triphenylphosphine at 50-300 deg.C under 1-300 bar. The component B is preferably 1,5,9-cyclododecatriene or cyclooctadiene, and 0.1-2,000 mg ruthenium (expressed in terms of metal) is used based on 1 kg component B. Further the component C is preferably a 1-20C monocarboxylic acid or the like.
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