Textbook Question
Show how you would synthesize the following ethers in good yield from the indicated starting materials and any additional reagents needed.
(a) cyclopentyl n-propyl ether from cyclopentanol and propan-1-ol
2
views
Ch. 14 - Ethers, Epoxides, and Thioethers
Wade9th EditionOrganic ChemistryISBN: 9780135213728
Not the one you use?Change textbookSelect a different textbook
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 14, Problem 43c
Give the structures of the intermediates represented by letters O, P, and Q in this synthesis.
Verified step by step guidance1
Step 1: Analyze the starting material and the first reaction. The starting material is an ester (methyl 3-phenylpropanoate). Reaction with LiAlH4 in ether reduces the ester to a primary alcohol. The intermediate J is therefore the corresponding primary alcohol, 3-phenylpropanol.
Step 2: Examine the conversion of J to K. The alcohol (J) is oxidized using NaOCl and TEMPO, which selectively oxidizes primary alcohols to aldehydes. Thus, intermediate K is 3-phenylpropanal.
Step 3: Analyze the reaction of J with TsCl and pyridine. This reaction converts the hydroxyl group of J into a tosylate group, forming intermediate L. Tosylates are good leaving groups, facilitating further reactions.
Step 4: Examine the reaction of L with KO-tBu. This is an elimination reaction where the tosylate group is eliminated, forming an alkene. Intermediate M is therefore 3-phenylpropene.
Step 5: Analyze the reaction of M with Br2 and H2O. This is a bromohydrin formation reaction, where the alkene reacts with bromine in water to form a bromohydrin. Intermediate N is 1-bromo-2-hydroxy-3-phenylpropane.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
9mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Synthesis Pathways
Synthesis pathways illustrate the step-by-step transformation of reactants into products through various intermediates. Understanding these pathways is crucial for identifying the structures of intermediates, as each step often involves specific reagents and conditions that dictate the outcome of the reaction.
Recommended video:
2:13
Energy Production In Biochemical Pathways Concept 1
Reagents and Their Functions
Different reagents play specific roles in organic reactions, such as reducing agents, oxidizing agents, or catalysts. For instance, LiAlH4 is a strong reducing agent used to convert carbonyl compounds to alcohols, while TsCl is used for activating alcohols for further reactions. Recognizing the function of each reagent helps in predicting the structure of intermediates.
Recommended video:
Guided course
02:36Identifying Functional Groups
Functional Group Transformations
Functional group transformations involve the conversion of one functional group into another, which is a common theme in organic synthesis. For example, the conversion of an alcohol to a carbonyl compound or vice versa is essential for understanding the intermediates in the synthesis pathway. Familiarity with these transformations aids in deducing the structures of intermediates labeled in the synthesis.
Recommended video:
Guided course
02:36Identifying Functional Groups
Related Practice
Textbook Question
Show how you would synthesize the following ethers in good yield from the indicated starting materials and any additional reagents needed.
(c) 2-ethoxyoctane from an octene
Textbook Question
Show how you would synthesize the following ethers in good yield from the indicated starting materials and any additional reagents needed.
(b) n-butyl phenyl ether from phenol and butan-1-ol
1
views
Textbook Question
Give the structures of intermediates A through H in the following synthesis of trans-1-cyclohexyl-2-methoxycyclohexane.
1
views
Textbook Question
Give the structures of the intermediates represented by letters K and Q in this synthesis.
1
views
Textbook Question
Give the structures of the intermediates represented by letters J, L, M, and N in this synthesis.
7
views