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Topic: trans acid into cyclic anhydride  (Read 3629 times)

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Offline patelnikunj2k

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trans acid into cyclic anhydride
« on: September 05, 2012, 04:59:05 AM »
Is it possible to convert trans acid into cyclic anhydride? If yes then how?
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Offline discodermolide

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Re: trans acid into cyclic anhydride
« Reply #1 on: September 05, 2012, 05:01:32 AM »
What do you mean by a trans acid? One with a double bond between the acid groups?
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Offline patelnikunj2k

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Re: trans acid into cyclic anhydride
« Reply #2 on: September 05, 2012, 05:05:52 AM »
I mean, trans-cyclopentane-1 2-dicarboxylic acid
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Offline sjb

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Re: trans acid into cyclic anhydride
« Reply #3 on: September 05, 2012, 05:07:36 AM »
Quote from: patelnikunj2k on September 05, 2012, 05:05:52 AM
I mean, trans-cyclopentane-1 2-dicarboxylic acid

What ways do you know of making anhydrides in general?
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Offline discodermolide

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Re: trans acid into cyclic anhydride
« Reply #4 on: September 05, 2012, 05:08:43 AM »
Quote from: patelnikunj2k on September 05, 2012, 05:05:52 AM
I mean, trans-cyclopentane-1 2-dicarboxylic acid

I would say not in this case.
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Offline patelnikunj2k

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Re: trans acid into cyclic anhydride
« Reply #5 on: September 05, 2012, 05:15:38 AM »
I know by using acetic anyhride, by removing water molecule (heating).
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Offline discodermolide

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Re: trans acid into cyclic anhydride
« Reply #6 on: September 05, 2012, 07:59:33 AM »
You can make mixed anhydrides from symmetrical ones, but not by removing water.
In your case how else could you try and prepare the anhydride. (This is a theoretical question because in this case I do not think it will form due to ring constraints).
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