content_image/941769.jpg content_image/941770.jpg content_image/941772.jpg content_image/941773.jpg content_image/941774.jpg content_image/941771.jpg content_image/941775.jpg
The present invention also encompasses the process for preparing a novel norbornene having a ketone structure rep› resented by: 

<img src='content_image/941769.jpg'>

and the process for preparing a novel norbornene having: 

<img src='content_image/941770.jpg'>

wherein R $^{3 }$is H or a hydrocarbon group; R:f2 is as defined above. 

Namely, the present invention provides the process for preparing the above-mentioned various fluorine-containing norbornenes at high yield by reacting a norbornene having C=O group which can be easily synthesized at high yield by 25 the Diels-Alder reaction, with a fluoroalkylation agent. 

The first of the preparation processes of the present inven› tion relates to the process for preparing the novel fluorine› containing norbornene derivative having a fluorine-contain› ing ketone structure which is represented by the formula (2): 

<img src='content_image/941772.jpg'>

by reacting the norbornene derivative having carboxylic acid ester or acid halide which is represented by the formula (1 ): 

<img src='content_image/941773.jpg'>

with a fluoroalkylation agent. 

Namely, the group represented by: 

<img src='content_image/941774.jpg'>

can be introduced by reacting a fluoroalkylation agent (Rf 1 ) in an amount equivalent to the weight of carboxylic acid ester or 

acid halide of the formula (1) and thereby the novel nor› bornene compound can be prepared. 

Examples of the norbornene derivative (1) as a starting material are preferably: 

<img src='content_image/941771.jpg'>

and the like. 

According to the preparation process of the present inven› tion, the ketone structure: 

corresponding to the fluoroalkylation agent (Rf 1 ) to be reacted with the norbornene derivative mentioned above as a starting material can be introduced. Concretely there can be obtained the following norbornene derivatives. 

<img src='content_image/941775.jpg'>

X is selected from alkyl esters such as ----COOCH$_{3}$ , ----COOC$_{2}$H$_{5 }$ and ----COOC(CH$_{3}$ ) 3 and acid halides, for example, --COP, ----COCl and -CO Br. 

