C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/513.5
C07C 63/68 (2006.01) C07C 51/08 (2006.01) C07C 51/09 (2006.01) C07C 51/38 (2006.01) C07D 215/56 (2006.01) C07D 401/06 (2006.01)
Patent
CA 1276175
ABSTRACT An improved process for the preparation of 2,3,4,5-tetrafluorobenzoic acid is described which involves decarboxylation of tetrafluorophthalic acid in the presence of a base catalyst. Also described is an improved method for preparing tetrafluorophthalic acid and, in turn, a one-pot process for tetrafluorobenzoic acid using the combination of the two improvements. These compounds are intermediates for the preparation of 1-cyclopropyl-6,7,8-trifluoro-1,4-oxo-3- quinoline carboxylic acid which is a key intermediate for the preparation of 7-aminosubstituted-1-cyclopropyl-6,8-difluoro- 4-oxo-quinolines which are antibacterial agents.
516173
Puls Timothy P.
Vande Vusse James
Wemple James N.
Macrae & Co.
Puls Timothy P.
Vande Vusse James
Warner-Lambert Company
Wemple James N.
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