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Mechanism question

Hello,

I was wondering if anyone could explain to me about the mechanism for acid anhydride esterification. Ideally could you explain from using a phenol as that is related to my investigation.

I am synthesising aspirin from salicylic acid using sulphuric acid as the catalyst.

I have used this website:
http://www.chem.ucalgary.ca/courses/351/Carey/Ch19/ch19-3-1-3.html

and it has the Fischer mechanism. Is this the same mechanism?

Sorry if this turns out to be in the wrong place or does not make any sense and thanks in advance to anyone who can help :smile:

faye
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