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Topic: Halogenating benzoic acid at the 4 position  (Read 7633 times)

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Offline limpet chicken

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Halogenating benzoic acid at the 4 position
« on: October 24, 2004, 11:06:12 PM »
I have a problem, I have been looking for references and procedures regarding halogenating benzoic acid at the 4 position, most particularly 4-fluorobenzoic, and 4-chlorobenzoic acids.

Anyone have links to preperations, especially of 4-fluorobenzoic acid?

Thanks.
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Offline AWK

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Re:Halogenating benzoic acid at the 4 position
« Reply #1 on: October 25, 2004, 08:03:00 AM »
2 and 4- Substituted benzoic acids are obtained in different way from substituted toluenes.
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Offline limpet chicken

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Re:Halogenating benzoic acid at the 4 position
« Reply #2 on: October 25, 2004, 01:25:39 PM »
Awk, do you have any patent numbers, links, or the procedure for preparing the 4- acids from substituted toluenes?

If you have, it would be a great help.
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Offline AWK

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Re:Halogenating benzoic acid at the 4 position
« Reply #3 on: October 26, 2004, 03:51:01 AM »
Eg.oxidation of o-Cl-toluene by KMnO4 to o-Cl-benzoic acid
http://www.orgsyn.org/orgsyn/default.asp?formgroup=basenp_form_group&dataaction=db&dbname=orgsyn
(ORGANIC SYNTHESES CV 2, 135)
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