Patent Number: 6,166,273

Title: Processes for fluorinating aromatic ring compounds

Abstract: A process is provided for increasing the fluorine content of benzene or pyridine rings which are optionally substituted with from 1 to 3 inert substituents. The process involves (a) contacting the ring with a metal fluoride composition comprising cupric fluoride (CuF.sub.2) at a temperature above 250.degree. C. sufficient to transfer F from cupric fluoride to the optionally substituted ring, thereby chemically reducing the metal fluoride composition; (b) oxidizing the reduced metal fluoride composition from (a) in the presence of HF to regenerate a metal fluoride composition comprising cupric fluoride; and (c) employing regenerated metal fluoride composition of (b) in (a).

Inventors: Subramanian; Munirpallam A. (Kennett Square, PA)

Assignee: E.I. du Pont de Nemours and Company

International Classification: C07B 39/00 (20060101); C07C 17/00 (20060101); C07C 17/12 (20060101); C07C 025/13 (); C07C 069/76 (); C07C 063/04 (); C07C 255/00 (); C07C 233/00 ()

Expiration Date: 12/26/2013