Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(a)
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Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
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Wade 9th EditionCh. 22 - Condensations and Alpha Substitutions of Carbonyl CompoundsProblem 68c
Wade 9th EditionCh. 22 - Condensations and Alpha Substitutions of Carbonyl CompoundsProblem 68cChapter 22, Problem 68c
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(c) 
Verified step by step guidance1
Step 1: Analyze the target molecule. The compound shown is a β-keto compound with a cyclopentane ring and a methyl group attached to the β-carbon. This suggests that it can be synthesized using an aldol condensation reaction.
Step 2: Identify the starting materials. To form the β-keto structure, you need an enolate donor and a carbonyl acceptor. The enolate donor could be acetone (CH3COCH3), and the acceptor could be cyclopentanone (C5H8O).
Step 3: Generate the enolate. Treat acetone with a base such as NaOH or LDA to form the enolate ion. This enolate will act as the nucleophile in the reaction.
Step 4: Perform the aldol addition. The enolate ion attacks the carbonyl carbon of cyclopentanone, forming a β-hydroxyketone intermediate. This step involves nucleophilic addition.
Step 5: Dehydrate the β-hydroxyketone. Heat the intermediate under acidic or basic conditions to remove water and form the α,β-unsaturated ketone. This completes the aldol condensation, yielding the target molecule.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Aldol Condensation
Aldol condensation is a reaction between aldehydes or ketones that contain alpha-hydrogens, leading to the formation of β-hydroxy aldehydes or ketones. This reaction involves the nucleophilic addition of an enolate ion to a carbonyl compound, followed by dehydration to yield an α,β-unsaturated carbonyl compound. It is a key reaction in organic synthesis for forming carbon-carbon bonds.
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Claisen Condensation
Claisen condensation is a reaction between two esters or an ester and a carbonyl compound in the presence of a strong base, resulting in the formation of a β-keto ester or a β-diketone. This reaction involves the formation of an enolate ion from one ester, which then attacks the carbonyl carbon of another ester, followed by subsequent hydrolysis. It is essential for constructing complex molecules in organic chemistry.
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Condensation Reactions
Condensation reactions are a class of reactions where two molecules combine to form a larger molecule, typically with the loss of a small molecule such as water or alcohol. In organic chemistry, these reactions are crucial for building larger, more complex structures from simpler precursors. Understanding the mechanisms and conditions for these reactions is vital for effective synthesis in organic chemistry.
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Related Practice
Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(e)
2
views
Textbook Question
Show how you would use the Robinson annulation to synthesize the following compounds.
(c)
Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(d)
1
views
Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(f)
3
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Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(b)
1
views