This invention aims at providing a catalyst for producing an optically active aldehyde or an optically active ketone, which is an optically active carbonyl compound, by carrying out selective asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, particularly a catalyst which is insoluble in a reaction mixture for obtaining optically active citronellal which is useful as a flavor or fragrance, by carrying out selective asymmetric hydrogenation of citral, geranial or neral; and a method for producing a corresponding optically active carbonyl compound. The invention relates to a catalyst for asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, which comprises a powder of at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table, or a metal-supported substance in which at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table is supported on a support, an optically active cyclic nitrogen-containing compound and an acid.
这项发明旨在通过对α,β-不饱和羰基化合物进行选择性不对称加
氢,特别是通过对
柠檬醛、香叶醛或
柠檬醛进行选择性不对称加
氢,从而提供用作
香料或香精的有用的光学活性
香茅醛的
催化剂,该
香茅醛是一种光学活性羰基化合物;以及生产相应的光学活性羰基化合物的方法。该发明涉及一种用于不对称加
氢α,β-不饱和羰基化合物的
催化剂,其包括来自周期表第8至第10族
金属中至少一种
金属的粉末,或者至少一种来自周期表第8至第10族
金属的
金属负载物质,该
金属负载在一种支撑物上,还包括光学活性的含
氮环化合物和酸。