Does the Clemmensen reduction have any effect on the carboxyl group $\ce{-COOH}$ if it is attached to some organic compound? If yes, what does it get reduced to?

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    $\begingroup$ You're putting zinc in acid, so there will be a reaction, but maybe not the one you wanted? $\endgroup$ – Zhe Jan 24 '17 at 1:34

I don't think so that there would be removal of carbonyl group because the -cooh group would be in resonance and also clemmensen reduction is preffered for aldehydes and ketones to remove oxygen . More help would be afyer understanding its mechanism hereMechanism of clemmensen reduction

Also the zinc(amphoteric) might react with the acid giving salt.

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