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1. The aldol condensation reaction belongs to a group of reactions characterized by formation of an...
Determine the theoretical and percent yield for this lab Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation:...
Determine the theoretical and percent yield for this lab
Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation: Synthesls of trans-p-anisalacetophenone Ketones that contain an a-hydrogen (a hydrogen on the C right next door to the carbonyl group) can be tabilized via keto-enol tautomerization, or through the loss of the a-hydrogen to form an enolate anion. enolate anion Enolate ions actas nudbophiles and are considerable more reactive than tois. The enolate on i the subject of today's experiment. The formation of an...
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in...
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
2) Consider the mixed aldol condensation reaction of 1-(1-methyleyclopentyl ethanone (shown in question 1) and propiophenone...
2) Consider the mixed aldol condensation reaction of 1-(1-methyleyclopentyl ethanone (shown in question 1) and propiophenone (shown below). Two major MIXED aldol condensation poducts arise from this reaction (shown below, labeled A and B) If you wish to form product B, to which starting carbonyl would you add a strong base such as LDA in order to form the enolate? Which carbonyl would you then add slowly to the enolate of the first carbony!
aldol condensation reaction Question 3: Is this reaction acid or base catalyzed? Tell the name of...
aldol condensation reaction
Question 3: Is this reaction acid or base catalyzed? Tell the name of the base used. Question 4: What is the role of ethanol in the experiment? Question 5: Why 1.0 M HCl is used at the end of the experiment? Question 6: 4-nirobenzaldehye cannot undergo aldol condensation reaction by itself in the presence of strong base, give the reason for that?
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal...
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal C 2,2-dimethylbutanal 3,3-dimethyl-2-butanone QUESTION 2 Which of the following constitutes a difference between an aldol and a Claisen condensation? basic conditions Ctetrahedral intermediate Cenolate ion formation protonation of the intermediate QUESTION 3 The product of an aldol condensation reaction is generally favored if Can unsymmetrical ketone and aldehyde are used Can unsymmetrical ester and ketone are used Cone of the carbonyl partners contains no...
1. Draw a mechanism for the following Aldol condensation reaction under basic conditions, including the formation...
1. Draw a mechanism for the following Aldol condensation reaction under basic conditions, including the formation of the enolate. Please include ALL lone pair electrons, formal charges, and stereo/regiochemistry whenever applicable. 1) LDA, H2O 2) LAH 2. Draw a mechanism for the following Dieckmann reaction under basic conditions, including the formation of the enolate. Please include ALL lone pair electrons, formal charges, and stereo/regiochemistry whenever applicable. 1) NaOEt 2) Hзо* OEt 3. Draw a mechanism for the following alkylation reaction...
Draw the different geometric isomers for dibenzalacetone (there are 3 of them). Why is the trans...
Draw the different geometric isomers for dibenzalacetone (there are
3 of them). Why is the trans isomer formed in this experiment?
The purpose of this experiment is to svnthesize dibenzalacetone (trans, trans-1. 5-diphenvl-1.4 pentadien-3-one) through the Aldol condensation of acetone with benzaldehyde. The synthesis begins bv using a strong base to generate the acetone enolate ion. Water (not shown) is formed as a byproduct. The equilibrium position of this reaction strongly favors the starting acetone, and the amount of acetone...
Lab : Aldol Condensation Purpose. In this lab you will conduct the Aldol condensation reaction under solid-state...
Lab : Aldol Condensation Purpose. In this lab you will conduct the Aldol condensation reaction under solid-state reaction conditions that will involve grinding reactants in the solid phase. You must read ahead and learn about this reaction and the chemical mechanism for the Aldol condensation. There are two possible products which are the initial Aldol or subsequent elimination product. You will need to isolate and purify your reaction product. You will use your melting point, IR, 1H and 13C NMR spectra to...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
1. The reaction web includes most of the reactions of enolates we have studied. The products...
1. The reaction web includes most of the reactions of enolates we have studied. The products of these reactions can be treated with other reagents to generate new functionality - think synthesis! Make up your own examples - e.g. What if you treated compound D with CH,MgBr? In the table, summarize the types of products produced from these reactions. CH3 MgBr acid quench acid quench NaOH, H2O EIO OEt acid quench acid quench acid quench D LIAIHA acid quench acid...
Determine the theoretical and percent yield for this lab
Wednerdouy 13 CH 4521-8: Crossed Aldol Condensation: Synthesls of trans-p-anisalacetophenone Ketones that contain an a-hydrogen (a hydrogen on the C right next door to the carbonyl group) can be tabilized via keto-enol tautomerization, or through the loss of the a-hydrogen to form an enolate anion. enolate anion Enolate ions actas nudbophiles and are considerable more reactive than tois. The enolate on i the subject of today's experiment. The formation of an...
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
2) Consider the mixed aldol condensation reaction of 1-(1-methyleyclopentyl ethanone (shown in question 1) and propiophenone (shown below). Two major MIXED aldol condensation poducts arise from this reaction (shown below, labeled A and B) If you wish to form product B, to which starting carbonyl would you add a strong base such as LDA in order to form the enolate? Which carbonyl would you then add slowly to the enolate of the first carbony!
aldol condensation reaction
Question 3: Is this reaction acid or base catalyzed? Tell the name of the base used. Question 4: What is the role of ethanol in the experiment? Question 5: Why 1.0 M HCl is used at the end of the experiment? Question 6: 4-nirobenzaldehye cannot undergo aldol condensation reaction by itself in the presence of strong base, give the reason for that?
QUESTION 1 Which of the following will not undergo an aldol condensation reaction? butanal C 2-methylbutanal C 2,2-dimethylbutanal 3,3-dimethyl-2-butanone QUESTION 2 Which of the following constitutes a difference between an aldol and a Claisen condensation? basic conditions Ctetrahedral intermediate Cenolate ion formation protonation of the intermediate QUESTION 3 The product of an aldol condensation reaction is generally favored if Can unsymmetrical ketone and aldehyde are used Can unsymmetrical ester and ketone are used Cone of the carbonyl partners contains no...
1. Draw a mechanism for the following Aldol condensation reaction under basic conditions, including the formation of the enolate. Please include ALL lone pair electrons, formal charges, and stereo/regiochemistry whenever applicable. 1) LDA, H2O 2) LAH 2. Draw a mechanism for the following Dieckmann reaction under basic conditions, including the formation of the enolate. Please include ALL lone pair electrons, formal charges, and stereo/regiochemistry whenever applicable. 1) NaOEt 2) Hзо* OEt 3. Draw a mechanism for the following alkylation reaction...
Draw the different geometric isomers for dibenzalacetone (there are
3 of them). Why is the trans isomer formed in this experiment?
The purpose of this experiment is to svnthesize dibenzalacetone (trans, trans-1. 5-diphenvl-1.4 pentadien-3-one) through the Aldol condensation of acetone with benzaldehyde. The synthesis begins bv using a strong base to generate the acetone enolate ion. Water (not shown) is formed as a byproduct. The equilibrium position of this reaction strongly favors the starting acetone, and the amount of acetone...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
1. The reaction web includes most of the reactions of enolates we have studied. The products of these reactions can be treated with other reagents to generate new functionality - think synthesis! Make up your own examples - e.g. What if you treated compound D with CH,MgBr? In the table, summarize the types of products produced from these reactions. CH3 MgBr acid quench acid quench NaOH, H2O EIO OEt acid quench acid quench acid quench D LIAIHA acid quench acid...
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