Process for preparing ring-fluorinated aromatics

Process for preparing a compound of formula (I)

• in which
• A is N,
• D is N,
• E is CH, and
• X1 is H, CN or F,
• by reacting a compound of the general formula (II)
• in which
• A is N,
• D is N,
• E is CH,
• X2 is H, Cl, Br, I or CN and
• Hal is Cl, Br or I,
• with a fluoride in the presence of at least one compound of the general formula (III)
• in which
• A is a radical of the formulae (IV) or (V)
• and
• B, independently of A, is a radical of the formulae (IV), (V), (VIa) or (VIb)
• where
• the individual R1 are the same or different and are each straight-chain or branched C1-C10-alkyl, straight-chain or branched C2-C10-alkylene or C6-C12-aryl,
• where one or more NR1R1 groups may also be a 3- to 5-membered, saturated or unsaturated ring which is formed from one nitrogen atom and otherwise carbon atoms,
• where the formula (IV) and the
• group in formula (VIa) may also be a radical of a saturated or unsaturated 4- to 8-membered ring which contains two nitrogen atoms and otherwise carbon atoms,
• X is N or P and
• AnΘ is one equivalent of an anion,
• characterized in that the reaction is effected in one stage.