| 摘要 |
PURPOSE:In hydrogenating an unsaturated aldehyde as a raw material, to obtain the titled compound economically in high yield, by using both easily obtainable Raney nickel and Raney cobalt as a hydrogenating catalyst. CONSTITUTION:An unsaturated aldehyde shown by the formula I (R<1> and R<2> are H, or lower alkyl; n is 1-4) is hydrogenated in the presence of Raney nickel and Raney cobalt as a catalyst, and preferably a tertiary amine as a cocatalyst in a polar solvent such as methanol, methyl Cellosolve, etc. at 20-150 deg.C, especially at about 50-90 deg.C, to give a compound shown by the formula II. Citral(3,7-dimethyl-2,6-octadienal), etc. may be cited as the compound shown by the formula I . A ratio of Raney nickel to Raney cobalt used is 1pt.wt/0.2- 10pts.wt. |
