Textbook Question
Show how you would synthesize the following derivatives from appropriate carbonyl compounds.
(c)
1
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Ch. 18 - Ketones and Aldehydes
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
Chapter 18, Problem 52b
Show how you would synthesize the following derivatives from appropriate carbonyl compounds.
(b) 
Verified step by step guidance1
Step 1: Identify the target molecule. The structure contains a benzyl group attached to a nitrogen atom, which is further bonded to a cyclopentyl group. This suggests the synthesis involves forming a secondary amine.
Step 2: Choose the appropriate carbonyl compound for the synthesis. To form the benzyl group attached to nitrogen, benzaldehyde (C₆H₅CHO) is a suitable starting material.
Step 3: Perform reductive amination. React benzaldehyde with cyclopentylamine (C₅H₉NH₂) in the presence of a reducing agent such as sodium cyanoborohydride (NaBH₃CN) or hydrogen gas with a catalyst (e.g., Pd/C). This reaction will form the secondary amine by reducing the imine intermediate.
Step 4: Ensure the reaction conditions are controlled to avoid over-reduction or side reactions. Use mild conditions to selectively reduce the imine without affecting the aromatic ring or other functional groups.
Step 5: Purify the product. After the reaction is complete, isolate the desired secondary amine using techniques such as extraction, distillation, or chromatography to ensure the final product is pure.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Carbonyl Compounds
Carbonyl compounds are organic molecules that contain a carbon atom double-bonded to an oxygen atom (C=O). This functional group is pivotal in organic synthesis, as it can undergo various reactions, including nucleophilic addition and condensation. Understanding the reactivity of carbonyls is essential for synthesizing derivatives, as they serve as key intermediates in many organic reactions.
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Nucleophilic Addition Reactions
Nucleophilic addition reactions involve the attack of a nucleophile on the electrophilic carbon of a carbonyl group. This reaction is fundamental in organic chemistry, allowing for the formation of alcohols, amines, and other functional groups from carbonyl compounds. Mastery of this concept is crucial for synthesizing derivatives, as it dictates how different nucleophiles can be introduced to the carbonyl carbon.
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Synthetic Pathways
Synthetic pathways refer to the step-by-step methods used to construct complex organic molecules from simpler ones. In the context of synthesizing derivatives from carbonyl compounds, understanding various synthetic routes, including the use of reagents and reaction conditions, is vital. This knowledge enables chemists to design efficient and effective strategies for creating desired compounds.
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Related Practice
Textbook Question
Show how you would accomplish the following syntheses efficiently and in good yield. You may use any necessary reagents.
(e)
1
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Textbook Question
Show how you would accomplish the following syntheses efficiently and in good yield. You may use any necessary reagents.
(g)
1
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Textbook Question
Predict the products formed when cyclohexanone reacts with the following reagents.
(a) CH3NH2, H+
1
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Textbook Question
Show how you would synthesize the following derivatives from appropriate carbonyl compounds.
(d)
1
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Textbook Question
Show how you would synthesize the following derivatives from appropriate carbonyl compounds.
(a)
2
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