| abstract |
A process for the preparation of fluoroaromatic compounds (such as fluoronitrobenzene compounds) comprises reacting corresponding chloroaromatic compounds (such as chloronitrobenzene compounds) with alkali metal fluoride salts in the presence of alkyldiorganoaminopyridinium salts as catalysts phase transfer. A secondary carbon atom is directly linked to the alkyl carbon atom, which in turn is directly linked to the nitrogen atom in the closed chain. A preferred catalyst is N- (2-ethylhexyl) -4- (N ', N'-dimethylamino) pyridinium chloride. |