Processes for producing 5-fluorobenzoic acids and their intermed

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

558318, 570127, C07C 6304

Patent

active

052411117

ABSTRACT:
A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it: ##STR1## wherein each of X.sub.1, X.sub.3, Y.sub.1 and Y.sub.3 is a halogen atom, and each of X.sub.2 and Y.sub.2 is hydrogen or a halogen atom.

REFERENCES:
patent: 3187057 (1965-06-01), Pefer et al.
patent: 4439620 (1984-03-01), Klauce et al.
CA 84(25):179843m 1970.
CA 90(1):6124y 1978.
Patent Abstracts of Japan, vol. 12, No. 467, (C-550) [3314], Dec. 7, 1988, & JP-A-63 188 643, Aug. 4, 1988, Y. Nishimura, et al., "Novel Fluorine-Containing Benzophenone and Production Thereof".
Chemical Abstracts, 77918q, vol. 113, No. 9, Aug. 27, 1990, & CN-A-1 031 074, Feb. 15, 1989, Y. Shi, et al., "Preparation of 2,4-Dichloro-5-Fluorobenzoic Acid".
Patent Abstracts of Japan, vol. 13, No. 205, (C-595) [3553], May 15, 1989, & JP-A-1 025 737, Jan. 27, 1989, S. Niizeki, et al., "Decarboxylation of Halogen-Substituted Benzenecarboxylic Acid".
Patent Abstracts of Japan, vol. 13, No. 187, (C-592) [3535], May 2, 1989, & JP-A-1 013 037, Jan. 17, 1989, Y. Yoshida, "Production of Aromatic Fluorine Compound".

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Processes for producing 5-fluorobenzoic acids and their intermed does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for producing 5-fluorobenzoic acids and their intermed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for producing 5-fluorobenzoic acids and their intermed will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2298844

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.