Gem-disubstituted cyclohexadienones and their production
申请人:ETHYL CORPORATION
公开号:EP0336371A2
公开(公告)日:1989-10-11
Gem-disubstituted cyclohexadienone in which the gem substituents are a perfluoroalkyl group and a trihydrocarbylsiloxy group are prepared by perfluoroalkylating a quinone with a perfluoroalkyltrihydrocarbylsilane in the presence of an active catalyst under essentially anhydrous conditions, preferably in a suitable liquid phase reaction medium, most preferably in a dipolar aprotic solvent. These gem-disubstituted compounds are readily convertible to perfluoroalkyl-substituted aromatics and thus provide a means of circumventing the traditional need for photo-chlorination followed by halogen exchange in the preparation of such products.