Textbook Question
Show how you would accomplish the following synthetic conversions efficiently and in good yield. You may use any necessary additional reagents and solvents.
(f)
1406
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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 47h
Show how you would accomplish the following synthetic conversions efficiently and in good yield. You may use any necessary additional reagents and solvents.
(h) 
Verified step by step guidance1
Step 1: Analyze the transformation. The starting material is a benzyl alcohol derivative with a hydroxyl group and a methyl group on the aromatic ring. The product is an aldehyde with a vinyl group and a methyl group on the aromatic ring. This suggests oxidation of the benzyl alcohol to an aldehyde and subsequent elimination to form the vinyl group.
Step 2: Perform oxidation of the benzyl alcohol group (-CH2OH) to an aldehyde (-CHO). Use a mild oxidizing agent such as PCC (Pyridinium Chlorochromate) or DMP (Dess-Martin Periodinane) to avoid overoxidation to a carboxylic acid.
Step 3: Introduce conditions for elimination to form the vinyl group. The hydroxyl group on the aromatic ring can be activated for elimination by converting it into a good leaving group, such as a tosylate (-OTs) using p-toluenesulfonyl chloride and a base like pyridine.
Step 4: Carry out the elimination reaction. Use a strong base such as potassium tert-butoxide (KOtBu) to promote elimination of the tosylate group, forming the vinyl group (-CH=CH2) on the aromatic ring.
Step 5: Verify the stereochemistry and ensure the reaction proceeds efficiently. Adjust reaction conditions (temperature, solvent) to optimize yield and minimize side reactions. Purify the product using techniques like recrystallization or column chromatography.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Synthetic Pathways
Synthetic pathways refer to the series of chemical reactions and transformations that convert starting materials into desired products. Understanding these pathways is crucial for planning efficient syntheses, as it involves selecting appropriate reagents, conditions, and reaction mechanisms to achieve high yields and minimize by-products.
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Reagents and Solvents
Reagents are substances used to bring about a chemical reaction, while solvents are the mediums in which reactions occur. Choosing the right reagents and solvents is essential for optimizing reaction conditions, influencing factors such as solubility, reactivity, and selectivity, which ultimately affect the yield and efficiency of the synthetic conversion.
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Reaction Mechanisms
Reaction mechanisms describe the step-by-step sequence of elementary reactions that occur during a chemical transformation. A thorough understanding of these mechanisms allows chemists to predict the outcomes of reactions, identify potential side reactions, and design strategies to enhance product formation, which is vital for achieving good yields in synthetic chemistry.
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Related Practice
Textbook Question
Show how you would accomplish the following synthetic conversions efficiently and in good yield. You may use any necessary additional reagents and solvents.
(e)
1360
views
Textbook Question
For each compound,
1. name the functional group.
2. show what compound(s) result from complete hydrolysis.
(a)
1355
views
Textbook Question
For each compound,
1. name the functional group.
2. show what compound(s) result from complete hydrolysis.
(c)
1391
views
Textbook Question
Show how you would accomplish the following synthetic conversions efficiently and in good yield. You may use any necessary additional reagents and solvents.
(g)
736
views
Textbook Question
For each compound,
1. name the functional group.
2. show what compound(s) result from complete hydrolysis.
(b)
1385
views