An object of the present invention is to provide a process for producing high purity tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester which has a small content of an unsaturated compound and which has an excellent fragrance and is useful as a perfume or a perfume component.
In a process for producing tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester by reacting tricyclo[5.2.1.0
2,6
]deca-3-ene with carbon monoxide and alcohol in the presence of HF, carried out separately are (a) a step in which tricyclo[5.2.1.0
2,6
]deca-3-ene is reacted with carbon monoxide to produce acyl fluoride and (b) a step in which acyl fluoride obtained in the step described above is reacted with alcohol to produce an ester, whereby tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester having a small content of an unsaturated compound can be obtained at a high yield.
Also, the reaction conditions at the step (a) described above are selected or a step for carrying out isomerization reaction of tricyclo[5.2.1.0
2,6
] decane-2-carboxylic fluoride obtained at the step (a) is interposed between the step (a) and the step (b), whereby capable of being efficiently produced is tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester having a structural ratio of 1.0 or more in exo-tricyclo[5.2.1.0
2,6
]decane-endo-2-carboxylic acid ester/endo-tricyclo[5.2.1.0
2,6
]decane-exo-2-carboxylic acid ester.
Further, the crude product of tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester thus obtained is subjected to contact treatment with specific glycol in the presence of an acid catalyst and then distilled, whereby high purity tricyclo[5.2.1.0
2,6
]decane-2-carboxylic acid ester which is reduced in impurity aldehyde and which is excellent in a fragrance can industrially advantageously be produced.
本发明的目的是提供一种生产高纯度
三环[5.2.1.0
2,6
]
癸烷-2-
羧酸酯的工艺,该工艺中不饱和化合物的含量较少,且具有极佳的香味,可用作香
水或香
水成分。
在生产
三环[5.2.1.0
2,6
]
癸烷-2-
羧酸酯的工艺中,
三环[5.2.1.0
2,6
]癸-3-烯与
一氧化碳和
乙醇在
氢氟酸存在下发生反应,分别进行以下步骤:(a)
三环[5.2.1.0
2,6
]癸-3-烯与
一氧化碳反应生成酰
氟的步骤,以及 (b) 在上述步骤中获得的酰
氟与醇反应生成酯的步骤,从而使
三环[5.2.1.0
2,6
]
癸烷-2-
羧酸酯,其中不饱和化合物含量较少,产率较高。
另外,选择上述步骤(a)的反应条件或进行
三环[5.2.1.0 2,6 ]
癸烷-2-
羧酸酯异构化反应的步骤
2,6
]
癸烷-2-羧基
氟化物进行异构化反应的步骤,从而能够高效地生产
三环[5.2.1.0
2,6
癸烷-2-
羧酸酯,其外
三环[5.2.1.0 2,6
2,6
]
癸烷-内-2-
羧酸酯/内-
三环[5.2.1.0
2,6
]
癸烷-外向-2-
羧酸酯。
此外,
三环[5.2.1.0
2,6
2,6 ]
癸烷-外-2-
羧酸酯的粗品在酸催化剂存在下与特定
乙二醇接触处理,然后蒸馏,得到高纯度的
三环[5.2.1.0
2,6
癸烷-2-
羧酸酯,其杂质醛含量降低,香味极佳。