Domanda del libro di testo
What two carbonyl compounds are required for the synthesis of morachalcone A, via a Claisen–Schmidt condensation?
<IMAGE>
888
views
Ch. 17 - Reactions at the Alpha-Carbon
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
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
Capitolo 17, Problema 28b
Draw the products of the following reactions:
b. 
Guida verificata passo dopo passo1
Step 1: Analyze the starting material, which is an ester. The structure contains a carbonyl group (C=O) attached to an oxygen atom, and the oxygen is bonded to a methyl group. The ester is part of a larger alkyl chain with branching.
Step 2: The first reagent, CH3O⁻ (methoxide ion), acts as a nucleophile. It will attack the carbonyl carbon of the ester, leading to a nucleophilic acyl substitution reaction. This step involves breaking the bond between the carbonyl carbon and the oxygen atom of the ester group.
Step 3: After the nucleophilic attack, the intermediate formed will have a tetrahedral structure. The leaving group (methoxy group, CH3O) will be expelled, resulting in the formation of a carboxylate ion.
Step 4: The second reagent, HCl, is added to the reaction mixture. The acidic conditions will protonate the carboxylate ion, converting it into a carboxylic acid.
Step 5: The final product of the reaction will be a carboxylic acid with the same alkyl chain structure as the original ester, minus the methoxy group. The branching in the alkyl chain remains unchanged.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
14mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Claisen Condensation
The Claisen condensation is a reaction between two esters or an ester and a carbonyl compound in the presence of a strong base, leading to the formation of a β-keto ester or a β-diketone. This reaction involves the nucleophilic attack of an enolate ion on the carbonyl carbon of another ester, followed by the elimination of an alcohol. Understanding this mechanism is crucial for predicting the products of the reaction shown.
Video consigliato:
08:28
Claisen Condensation
Enolate Ion Formation
Enolate ions are formed when a carbonyl compound, such as an ester, is deprotonated at the alpha carbon by a strong base. This ion acts as a nucleophile in various reactions, including the Claisen condensation. Recognizing how enolate ions are generated and their role in nucleophilic attacks is essential for understanding the reaction pathway and the final products.
Video consigliato:
02:26Formation of Enolates
Acid-Base Reactions
Acid-base reactions involve the transfer of protons (H+) between reactants, which can influence the outcome of organic reactions. In the context of the given reaction, HCl serves as an acid that can protonate the enolate ion or other intermediates, stabilizing the reaction products. A solid grasp of acid-base chemistry is necessary to predict how the addition of HCl will affect the final products of the Claisen condensation.
Video consigliato:
02:49The Lewis definition of acids and bases.
Pratica correlata
Domanda del libro di testo
Describe how the following compounds can be prepared using an aldol addition in the first step of the synthesis:
c.
1198
views
Domanda del libro di testo
Write the mechanism for the reaction of a 1,7-diester with an alkoxide ion to form a cyclic b-keto ester.
873
views
Domanda del libro di testo
Which of the following esters cannot undergo a Claisen condensation?
1273
views
Domanda del libro di testo
Draw the products of the following reactions:
a.
753
views
Domanda del libro di testo
Show how each of the following compounds can be prepared from methyl phenyl ketone:
c.
923
views