Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives

Bruice8th EditionOrganic ChemistryISBN: 9780135213711당신이 사용하는 게 아니라요?교과서 변경

Bruice 8th Edition

Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives

문제 23b

16장, 문제 23b

How would you make the following compounds from N-benzylbenzamide?
b. benzoic acid

검증된 단계별 안내

Step 1: Identify the functional groups in N-benzylbenzamide. The molecule contains an amide group (-CONH-) attached to a benzyl group and a benzene ring.

Step 2: Recognize that benzoic acid is the target compound, which contains a carboxylic acid group (-COOH) attached to a benzene ring. This indicates that the amide group must be hydrolyzed to form the carboxylic acid.

Step 3: Plan the reaction. Hydrolysis of the amide group can be achieved using either acidic or basic conditions. For example, you can use aqueous HCl (acidic hydrolysis) or aqueous NaOH (basic hydrolysis) followed by acidification.

Step 4: Perform the hydrolysis. Under acidic conditions, the amide group is protonated, making it more susceptible to nucleophilic attack by water. This leads to the cleavage of the C-N bond, forming benzoic acid and releasing benzylamine as a byproduct.

Step 5: Isolate and purify the benzoic acid. After the reaction is complete, the mixture can be acidified (if basic hydrolysis was used) and the benzoic acid can be extracted and purified using techniques such as recrystallization.

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주요 개념

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N-benzylbenzamide Structure

N-benzylbenzamide is an amide compound where a benzyl group is attached to the nitrogen of a benzamide. Understanding its structure is crucial for predicting its reactivity in chemical reactions, particularly in transformations that involve the cleavage of the amide bond or functional group modifications.

Hydrolysis of Amides

Hydrolysis is a chemical reaction involving the breakdown of a compound by water. In the case of amides, hydrolysis can convert them into carboxylic acids and amines. This reaction is essential for converting N-benzylbenzamide into benzoic acid, as it involves the cleavage of the amide bond and the addition of a hydroxyl group.

Carboxylic Acid Formation

Carboxylic acids are organic compounds characterized by the presence of a carboxyl group (-COOH). The formation of benzoic acid from N-benzylbenzamide involves the introduction of this functional group through hydrolysis. Understanding the properties and reactivity of carboxylic acids is important for predicting their behavior in further chemical reactions.

How would you make the following compounds from N-benzylbenzamide? b. benzoic acid