From: Ana G. Oliveira (amagoliveira$##$gmail.com)
Date: Thu Jan 17 2008 - 18:59:48 EST
Hi!
In the end, you can remove traces of acetic acid using cyclohexane to make
an azeotrope (just dissolve the product in a bit of a convenient solvent and
add a good quantity of cyclohexane). Rotavap everything. Repeat until no
acetic acid is present. You can also use toluene instead of cyclohexane, but
this one is the best.
Ana
On Jan 17, 2008 4:50 PM, Manjunath Channapur <channapur$##$gmail.com> wrote:
> Hi
> usually if acetic acid(glacial) is there as solvent and doing workup you
> can concentrate reaction mixture using high vaccum pump(stability of product
> w.r.t temprature) and give water wash to remove traces of acetic acid,if
> product is solid and ppted out filter it otherwise add water and extracting
> solvent(product soluble) and do usual work-up.
> the above method i tried works good, you can also try
>
> all the best
> Manjunath B C
>
>
> On 1/16/08, diogo$##$unilavras.edu.br <diogo$##$unilavras.edu.br> wrote:
> >
> > Hi
> >
> > Iīm preparing a maleimide by heating an aminophenol reagent in glacial
> > acetic acid to reflux.
> > How can I isolate this weak acidic product from this acetic media? I
> > donīt
> > have acess to high tec apparattus, only a rotatory evaporator.
> > anyone can help? is there a more suitable method for this synthesis?
> >
> > thanks
> >
> > Diogo
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>
>
> --
> Manjunath
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