Domanda del libro di testo
Explain why hydroxide ion catalyzes the reaction of piperidine with 2,4-dinitroanisole but has no effect on the reaction of piperidine with 1-chloro-2,4-dinitrobenzene.
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Ch. 18 - Reactions of Benzene and Substituted Benzenes
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- 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. 18 - Reactions of Benzene and Substituted BenzenesProblema 101a
Bruice 8th EditionCh. 18 - Reactions of Benzene and Substituted BenzenesProblema 101aCapitolo 18, Problema 101a
Tyramine is an alkaloid found in mistletoe and ripe cheese. Dopamine is a neurotransmitter involved in the regulation of the central nervous system.
a. How can tyramine be prepared from b-phenylethylamine?
Guida verificata passo dopo passo1
Step 1: Analyze the structures of tyramine and β-phenylethylamine. Tyramine has a hydroxyl (-OH) group attached to the benzene ring, while β-phenylethylamine lacks this functional group. The goal is to introduce the hydroxyl group onto the benzene ring of β-phenylethylamine.
Step 2: Select an appropriate reaction to introduce the hydroxyl group. A common method is electrophilic aromatic substitution, where a hydroxyl group can be added to the benzene ring. This can be achieved using phenol synthesis methods, such as hydroxylation with reagents like dilute sulfuric acid and sodium nitrite.
Step 3: Protect the amine group (-NH2) of β-phenylethylamine to prevent unwanted side reactions during the hydroxylation process. This can be done by converting the amine into a protecting group, such as an amide, using acylation (e.g., reaction with acetic anhydride).
Step 4: Perform the hydroxylation reaction on the benzene ring of the protected β-phenylethylamine. This introduces the hydroxyl group at the desired position on the aromatic ring.
Step 5: Remove the protecting group from the amine to regenerate the free amine group, yielding tyramine. This can be achieved by hydrolysis of the amide under acidic or basic conditions.
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Tyramine Synthesis
Tyramine can be synthesized from b-phenylethylamine through a process called hydroxylation, where a hydroxyl group (-OH) is added to the aromatic ring. This reaction typically involves the use of enzymes or chemical reagents that facilitate the introduction of the hydroxyl group, resulting in the formation of tyramine, which is a phenolic compound.
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Percorso guidato
1:16
Synthesis of Amino Acids: Strecker Synthesis Example 1
b-Phenylethylamine Structure
b-Phenylethylamine is an organic compound with a structure that includes a phenyl group attached to an ethylamine chain. Its structure is crucial for understanding its reactivity and how it can be transformed into other compounds, such as tyramine, through specific chemical reactions that modify the amine or aromatic functionalities.
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14:01Drawing Contributing Structures
Hydroxylation Reactions
Hydroxylation reactions are chemical processes that introduce hydroxyl groups into organic molecules. In the context of synthesizing tyramine from b-phenylethylamine, hydroxylation is essential as it alters the compound's properties and reactivity, allowing for the formation of biologically active compounds like tyramine, which plays a role in neurotransmission.
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Percorso guidato
2:08Kolbe-Schmidt Reaction Concept 1
Pratica correlata
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Describe how 3-methyl-1-phenyl-3-pentanol can be prepared from benzene. You can use any inorganic reagents and solvents, and any organic reagents provided they contain no more than two carbons.
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a. Explain why the following reaction leads to the products shown:
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