Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile

Details Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile

1996-03-04

1997-09-23

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitriles

C07C25324

Patent

active

056706944

ABSTRACT:
A mixture of 2,4-dichloro-5-fluorotoluene and 2,6-dichloro-3-fluorotoluene which cannot be separated in an economically efficient manner and can be reacted individually to give the corresponding benzonitriles is subjected according to the invention to ammoxidation in the form of this mixture and then separated at the stage of the benzonitriles by methods known to the person skilled in the art.

REFERENCES:
patent: 4582647 (1986-04-01), Bayerl et al.
patent: 5187295 (1993-02-01), Schach
patent: 5464810 (1995-11-01), Haas et al.
patent: 5475164 (1995-12-01), Bussmann
Chemical Abstracts, vol. 113, abstract No. 113:77918q, abstract of CN 1,031,074, p. 738, (1990).
I. Shigehara, CA115:182866, Preparation of 2,6-dichloro-3-fluorobenzonitrile, (1991).

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