Gem-substituted cyclohexadienones and their preparation

Details Gem-substituted cyclohexadienones and their preparation Gem-substituted cyclohexadienones and their preparation

C - Chemistry, Metallurgy

07

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260/447.6

C07F 7/18 (2006.01) C07C 45/62 (2006.01) C07C 45/67 (2006.01) C07C 45/68 (2006.01) C07C 49/497 (2006.01) C07C 49/713 (2006.01) C07C 49/747 (2006.01)

Patent

CA 1334206

Gem-disubstituted cyclohexadienone in which the gem substituents are a perfluoroalkyl group and a trihydrocar- bylsiloxy 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 prepara- tion of such products.

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