4-Fluorobenzoic acid cas:456-22-4 is commercially available. It may be prepared via the Schiemann reaction, in which a 4-aminobenzoic acid, protected as the ethyl ester, is diazotised and then fluoride introduced using tetrafluoroborate. Hydrolysis of the ester converts it back to the free acid.
4-Fluorobenzoic acid has been observed to form by the aerobic biotransformation of 4-fluorocinnamic acid.
We also supply the following products：
2-Fluorobenzoic acid CAS:445-29-4
3-Fluorobenzoic acid CAS:455-38-9
Tetrafluoroterephthalic acid CAS:652-36-8

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