content_image/938820.jpg content_image/938825.jpg content_image/938826.jpg content_image/938819.jpg content_image/938821.jpg content_image/938822.jpg content_image/938823.jpg content_image/938824.jpg content_image/938827.jpg
In the norbomene backbone, one X may be present or a plurality of the same or different X bonded to each other may be present. 

Y may be replaced with H, F, Cl, an alkyl group or a fluorine-containing alkyl group, and it is particularly prefer- able that Y is replaced with F or a fluorine-containing alkyl group because transparency can be enhanced in case of use for a resist. 

Examples of preferred norbomene derivative to be used as a starting material (formula (1)) are as follows. 

<img src='content_image/938820.jpg'>

The second preparation process of the present invention relates to the process for preparing the fluorine-containing norbornene 20 derivative having a fluorine-containing ter› tiary alcohol structure represented by the formula ( 4): 

<img src='content_image/938825.jpg'>

by reacting the norbornene derivative having a ketone struc› ture represented by the formula (3): 

<img src='content_image/938826.jpg'>

with a fluoroalkylation agent (Rf2). 

In this preparation process, X $^{3 }$in the starting material of the formula (3) is a moiety of ketone structure and may be a fluorine-containing ketone: 

<img src='content_image/938819.jpg'>

obtained by the above-mentioned first preparation process, or may be a fluorine-containing ketone: 

<img src='content_image/938821.jpg'>

obtained by other preparation process. Also X $^{3 }$may be a hydrocarbon type ketone structure: 

<img src='content_image/938822.jpg'>

having no fluorine or may be aldehyde: 

<img src='content_image/938823.jpg'>

Y is selected from H or the above-mentioned substituent Y and there are preferably the same examples as those of the above-mentioned Y. 

Examples of preferred derivative having a fluorine-con- taining ketone structure: 

<img src='content_image/938824.jpg'>

which is used as the starting material (formula (3)) are the same as those of the norbomene derivative having a fluorine- containing ketone structure obtained by the above-mentioned preparation process. 

According to the preparation process of the present inven› tion, a moiety of fluorine-containing tertiary alcohol: 

<img src='content_image/938827.jpg'>

corresponding to the reacted fluoroalkylation agent (Rf 2 ) can be introduced to the norbomene derivative of a starting mate- rial. 

Concretely there can be obtained the following norbornene derivatives: 

