Answer :
Acylation reactions is common to the formation of esters and acid anhydrides.
- Acylation reactions between alcohols and either acyl chlorides or acid anhydrides or esterification reactions between carboxylic acids and alcohols result in the formation of esters.
- Acid chlorides and carboxylic acid or carboxylate anion are typically combined in a nucleophilic acyl substitution process to produce acid anhydrides.
Alcoholysis Anhydrides react with alcohols to produce esters as the primary product and a carboxylate as a byproduct, which is the conversion of acid anhydrides to esters. In order to neutralize any generated acid, the reaction is often conducted with a base, such as NaOH or pyridine.
Other byproducts are : alcohol, H2O, carboxylic acid, CO2
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