Final answer:
An acylation reaction between an anhydride and an amine produces an amide and an amine salt of a carboxylic acid. This type of reaction is a kind of amidation where water is removed, leading to amide formation.
Step-by-step explanation:
The acylation reaction between an anhydride and an amine typically produces an amide and a byproduct that is an amine salt of a carboxylic acid. This reaction is part of the broader category known as amidation, where a carboxylic acid (or its derivative, like an anhydride) reacts with an amine to form an amide, while eliminating a molecule of water. This process is similar to the formation of an ester from the reaction of a carboxylic acid with an alcohol. For example, when a carboxylic acid anhydride reacts with a primary amine, a secondary amide is formed; and when it reacts with a secondary amine, a tertiary amide is produced. As part of this reaction, water is eliminated, leading to the formation of the amide from the remaining parts of the anhydride and the amine.