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 68d
Wade 9th EditionCh. 22 - Condensations and Alpha Substitutions of Carbonyl CompoundsProblem 68dChapter 22, Problem 68d
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(d) 
Verified step by step guidance1
Step 1: Identify the target molecule and recognize the functional groups present. The compound contains two ketone groups and a tert-butyl group attached to the carbon chain. This suggests that a condensation reaction, such as an aldol or Claisen condensation, could be used to form the molecule.
Step 2: Determine the starting materials. For an aldol condensation, you need two carbonyl compounds (aldehydes or ketones). In this case, one starting material could be cyclopentanone, and the other could be tert-butyl methyl ketone.
Step 3: Plan the reaction mechanism. In an aldol condensation, one carbonyl compound acts as the nucleophile (enolate ion) and the other as the electrophile. Cyclopentanone can form an enolate ion under basic conditions, which will attack the carbonyl carbon of tert-butyl methyl ketone.
Step 4: Describe the reaction conditions. Use a base such as NaOH or KOH to generate the enolate ion from cyclopentanone. Then, allow the enolate to react with tert-butyl methyl ketone to form a β-hydroxy ketone intermediate. Heat the reaction mixture to induce dehydration, forming the α,β-unsaturated ketone.
Step 5: Verify the structure of the product. Ensure that the final product matches the target molecule, with the correct placement of the ketone groups and the tert-butyl group. Adjust the reaction conditions or starting materials if necessary to achieve the desired structure.
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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. Understanding this mechanism is crucial for synthesizing complex organic molecules.
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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 the other ester. Mastery of this reaction is essential for constructing carbon skeletons in organic synthesis.
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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. These reactions are fundamental in organic chemistry for building complex structures and can involve various functional groups. Recognizing the conditions and mechanisms of different condensation reactions is vital for effective synthetic strategies.
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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.
(c)
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Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(e)
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Textbook Question
Predict the products of the following reactions.
(a) cyclopentanone + Br2 in acetic acid
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Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(f)
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Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(b)
1172
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