Textbook Question
Show how each of the following compounds can be prepared using the given starting material, any needed inorganic reagents, and any organic compound that has no more than four carbons:
f.
793
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Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 7 - The Reactions of Alkynes • An Introduction to Multistep SynthesisProblem 52b
Bruice 8th EditionCh. 7 - The Reactions of Alkynes • An Introduction to Multistep SynthesisProblem 52bChapter 8, Problem 52b
Show how each of the following compounds can be prepared using the given starting material, any needed inorganic reagents, and any organic compound that has no more than four carbons:
b. 
Verified step by step guidance1
Step 1: Begin with the starting material, acetylene (HC≡CH). Perform a hydroboration reaction using diborane (B2H6) to convert the alkyne into an alkene. This reaction will yield ethene (CH2=CH2).
Step 2: Perform a Markovnikov addition of HBr to ethene. This reaction will produce bromoethane (CH3CH2Br).
Step 3: React bromoethane with magnesium in dry ether to form the Grignard reagent, ethylmagnesium bromide (CH3CH2MgBr).
Step 4: Prepare propanal (CH3CH2CHO) by oxidizing propanol (CH3CH2CH2OH) using PCC (pyridinium chlorochromate). Propanol is an organic compound with no more than four carbons.
Step 5: React the Grignard reagent (CH3CH2MgBr) with propanal (CH3CH2CHO) to form the desired product, 2-bromo-3-methylbutane (CH3CH2CHCH3 with a Br substituent). This reaction involves nucleophilic addition followed by protonation.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Functional Groups
Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Understanding the functional groups present in both the starting material and the target compounds is essential for determining the appropriate reactions and reagents needed for synthesis.
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Identifying Functional Groups
Reaction Mechanisms
Reaction mechanisms describe the step-by-step process by which reactants are converted into products. Familiarity with common mechanisms, such as nucleophilic substitution or elimination reactions, is crucial for predicting how to transform the starting material into the desired compounds using the specified reagents.
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Synthesis Strategies
Synthesis strategies involve planning a series of chemical reactions to construct a target molecule from simpler starting materials. This includes selecting appropriate reagents, considering reaction conditions, and ensuring that the overall pathway is efficient and feasible, especially when limited to organic compounds with four or fewer carbons.
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Related Practice
Textbook Question
Show how the following compounds can be synthesized starting with ethyne:
b. trans-3-heptene
1123
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Textbook Question
Show how each of the following compounds can be prepared using the given starting material, any needed inorganic reagents, and any organic compound that has no more than four carbons:
a.
1152
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Textbook Question
Show how the following compounds can be synthesized starting with ethyne:
a. cis-2-octene
1239
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Textbook Question
Show how each of the following compounds can be prepared using the given starting material, any needed inorganic reagents, and any organic compound that has no more than four carbons:
c.
1125
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Textbook Question
Show how each of the following compounds can be prepared using the given starting material, any needed inorganic reagents, and any organic compound that has no more than four carbons:
e.
832
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