| 摘要 |
PCT No. PCT/US87/02829 Sec. 371 Date Feb. 9, 1987 Sec. 102(e) Date Feb. 9, 1987 PCT Filed Dec. 30, 1986 PCT Pub. No. WO87/04148 PCT Pub. Date Jul. 16, 1987.A process is disclosed for preparing fluoroaromatic compounds (such as fluoronitrobenzene compounds) by reaction of corresponding chloroaromatic compounds (such as chloronitrobenzene compounds) with alkali metal fluoride salts in the presence of alkyldiorganoaminopyridinium salts as phase transfer catalysts. A secondary carbon atom is directly attached to the alkyl carbon atom which is directly attached to the ring nitrogen atom. A preferred catalyst is N-(2-ethylhexyl)-4-(N',N'- dimethylamino)pyridinium chloride.
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