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Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
All textbooksMullins 1st EditionCh. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid DerivativesProblem 59b
Chapter 18, Problem 59b

Predict the product of the following reaction sequences.
(b) Chemical reaction sequence showing a cyclic compound with a cyano group, followed by reduction steps using LiAlH4 and quenching with H3O+.

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Identify the functional group present in the starting material. The starting material is a nitrile, characterized by the -CN group.
Recognize the reagents used in the reaction. Lithium aluminum hydride (LiAlH4) is a strong reducing agent, and tetrahydrofuran (THF) is a common solvent for such reductions.
Understand the role of LiAlH4 in the reaction. LiAlH4 will reduce the nitrile group (-CN) to a primary amine (-CH2NH2).
Consider the second step of the reaction sequence. The addition of H3O+ (acidic workup) is used to quench the reaction, ensuring the complete conversion of the intermediate to the final product.
Predict the structure of the final product. The nitrile group will be reduced to a primary amine, resulting in a cyclohexylamine derivative.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Reaction Mechanisms

Understanding reaction mechanisms is crucial in organic chemistry as they describe the step-by-step process by which reactants transform into products. This includes identifying intermediates, transition states, and the movement of electrons. A clear grasp of mechanisms helps predict the outcome of reactions and the stability of products formed.
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Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups allows chemists to predict reactivity and the types of reactions that can occur. For example, alcohols, carboxylic acids, and amines each have distinct behaviors in chemical reactions.
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Stereochemistry

Stereochemistry involves the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. It is essential for predicting the products of reactions, especially in cases where chirality is involved. Understanding stereochemical principles helps in determining the configuration of products and their potential biological activity.
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Related Practice
Textbook Question

Give the nitrile and organometallic reagent you would use to make the following ketones. There are two possible answers for both.

(b)

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Textbook Question

On a day in which the laboratory air conditioning stopped working, a chemist hypothesized that the atmosphere would provide enough ambient heat to drive the nitrile hydrolysis reaction to the carboxylic acid. Based on the IR of the resulting product, was this hypothesis correct?

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Textbook Question

Predict the product of the following reaction sequences.

(a)

Textbook Question

Reduction of two different carboxylic acid derivatives with LiAlH₄ would give the amine shown. Identify these carboxylic acid derivatives.

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Textbook Question

Give the nitrile and organometallic reagent you would use to make the following ketones. There are two possible answers for both.

(a)

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