FIELD: industrial organic synthesis.
SUBSTANCE: invention relates to preparation of alkylaromatic intermediates including perfluorinated carbon atom utilized in production of agrochemically important active compounds. Intermediates simultaneously containing aniline function are obtained from homocyclic arylcarbamoyl fluoride including at least one perhalogenated carbon atom preferably bearing at least two halogen atoms capable of being replaced by fluorine atoms when in liquid-phase contact with hydrofluoric acid and water. During this reaction, molar ratio of hydrofluoric acid to arylcarbamoyl fluoride is maintained equal to 4, preferably to 5 and not higher than 11. Water is added to reaction mixture (at 10 to 90°C) when only one exchangeable halogen atom remains unreplaced. Arylcarbamoyl fluoride is obtained in situ by adding corresponding isocyanate to liquid hydrofluoric acid at temperature not exceeding 10°C. Process is carried out continuously in two reactors, the first one serving for halogen exchange reaction and the second for addition of water. Temperature 40°C is maintained until only one exchangeable halogen atom remains unreplaced.
EFFECT: increased yield and improved quality of desired product and economical characteristics.
9 cl, 4 ex
