A substituted cyclopentanone represented by the following formula (2):
(wherein R
3
and R
4
represent a substituent having 1 to 8 carbon atoms, may be the same as R
1
and R
2
, respectively, and may be the same as each other) can be produced by hydrogenating the double bond in a compound represented by the following formula (1):
(wherein R
1
and R
2
represent a substituent having 1 to 8 carbon atoms) in the presence of a transition metal catalyst by using a carboxylic acid or a specific concentration of a carboxylic acid ester as a solvent. This process can produce a substituted cyclopentanone which is useful as a jasmine fragrance, an intermediate thereof or the like, in a simple and inexpensive manner at a high cis-isomer ratio.
以下式子(2)所表示的取代
环戊酮(其中R3和R4代表具有1至8个碳原子的取代基,可以与R1和R2分别相同,也可以相互相同)可以通过在过渡
金属催化剂存在下使用
羧酸或特定浓度的
羧酸酯作为溶剂,在化合物(1)所表示的双键上进行氢化反应而制得。(其中R1和R2代表具有1至8个碳原子的取代基)。该过程可以以高顺式异构体比例简单而廉价地生产出有用的茉莉花香气、其中间体等取代
环戊酮。