| 摘要 |
PURPOSE:To obtain the titled compound useful as perfumes, etc. in high yield industrially and advantegeously with ease, by reducing a 2-hydroxycycloalkanone having a specific carbon number as a raw material with hydrogen gas in the presence of zinc free of surface oxide therefrom. CONSTITUTION:A 2-hydroxycycloalkanone or its ester as a raw material is dissolved in an organic solvent (a solvent, having >=60 deg.C boiling point and forming an azeotropic mixture with water, for example cyclohexane, benzene, etc., is preferably used). The amount to the dissolved is preferably within 0.1-30wt% range. Then it is contacted with hydrogen in the presence of zinc freed of surface oxideto obtain the aimed compound. Although zinc previously freed of the surface oxide can be used as the above-mentioned zinc, a method for contacting the zinc with an acid in a reaction vessel is preferably adopted to simplify operations. The preferred molar amount of zind to be added is 0.5-5 times that of the raw material. |
