Homework Answers
lda is base and removes the proton and forms the enolate ion and then undergoes the smith reaction and forms the di carbonyl compound as follows
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3) Draw the structure of the enolate formed in the first reaction and then the mechanism...
1) Draw the structure of the enolate formed in the first reaction and then the mechanism...
1) Draw the structure of the enolate formed in the first reaction and then the mechanism of the addition in the second reaction. (8 pts) LDA No mechanism in this step Mechanism starts here
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the s...
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the second reaction. There is an acid work up step at the very end to neutralize charges only. (10 pts) LDA No mechanism Mechanism starts here in this step
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw th...
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw the structure of an alkyl bromide (R-Br) and an alkoxide (R-O) that would provide the most efficient synthesis of the following ether by the Williamson ether synthesis. Target ether 8. (5 pts.) Draw a mechanism for the following E2 reaction. Draw the major product. Be sure to include any necessary H's in your structure as you draw the mechanism. OH...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile attacking another molecule of ester. The resulting product of this reaction is a Beta-ketoester. Draw the enolate anion which serves as the nucleophile in the reaction above. Draw the resonance structure of this enolate. Look at the mechanism of this reaction in your textbook (7^th edition), pages 773-774. What type of reaction does this resemble, S_N1,S_N2, E1, or E2? Ethanol is one of the...
4. (2 pts) Consider the enolate forming reaction below. Provide the structure of the enolate anion...
4. (2 pts) Consider the enolate forming reaction below. Provide the structure of the enolate anion formed in this reaction (only need to provide one resonance contributor). HiC o: H2C Нас pKa -20 pKa -33 Enolate oti (2 pts) Based on the information provided, do you expect the favored enolate to be the kinetic or thermodynamic enolate? Briefly explain.
Problem 19.41a Write a detailed mechanism for the following reaction. EtoY OE orbollowed OEt + EtoNa...
Problem 19.41a Write a detailed mechanism for the following reaction. EtoY OE orbollowed OEt + EtoNa Eto OEt OE Get help answering Molecular Drawing questions. X Incorrect. Draw step one of the mechanism which forms the initial carbanion. Draw only the carbanion form of the reaction, NOT the enolate. Include lone pairs and formal charges in the mechanism. Draw out explicitly only the ONE hydrogen that is removed in this mechanistic step. DO NOT USE ABBREVIATIONS SUCH AS OEt for...
The following structure represents an intermediate formed by addition of an ester enolate ion to a...
The following structure represents an intermediate formed by addition of an ester enolate ion to a second ester molecule. Draw the reactant. ball & stick Blabels • You do not have to consider stereochemistry, • You do not have to explicitly draw Hatoms. • Do not include lone pairs in your answer. They will not be considered in the grading С P 012 <
7. Draw the structure of the organic product(s) formed in the following reaction, and propose an...
7. Draw the structure of the organic product(s) formed in the following reaction, and propose an electron-pushing mechanism for the reaction. Use arrows to clearly show the movement of electrons in each step. L E + OH + H heat - NCH₃ Mechanism: Final product(s):
Draw the major enolate region-isomer expected from each of these carbon acids under the reaction condition...
Draw the major enolate region-isomer expected from each of these carbon acids under the reaction condition indicated in the incomplete equations. Classify each enolate as either kinetic or thermodynamic (16 pts.) LDA. - 78 on .28 KO-t-Bu t-BUOH KO-t-Bu 1-BUOH
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...
1) Draw the structure of the enolate formed in the first reaction and then the mechanism of the addition in the second reaction. (8 pts) LDA No mechanism in this step Mechanism starts here
2) Draw the structure of the enolate formed in the first reaction and then the mechanism of the Aldol reaction in the second reaction. There is an acid work up step at the very end to neutralize charges only. (10 pts) LDA No mechanism Mechanism starts here in this step
6. (4 pts.) Draw the two resonance structures of the enolate formed from the following reaction: 7. (4 pts) Draw the structure of an alkyl bromide (R-Br) and an alkoxide (R-O) that would provide the most efficient synthesis of the following ether by the Williamson ether synthesis. Target ether 8. (5 pts.) Draw a mechanism for the following E2 reaction. Draw the major product. Be sure to include any necessary H's in your structure as you draw the mechanism. OH...
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile attacking another molecule of ester. The resulting product of this reaction is a Beta-ketoester. Draw the enolate anion which serves as the nucleophile in the reaction above. Draw the resonance structure of this enolate. Look at the mechanism of this reaction in your textbook (7^th edition), pages 773-774. What type of reaction does this resemble, S_N1,S_N2, E1, or E2? Ethanol is one of the...
4. (2 pts) Consider the enolate forming reaction below. Provide the structure of the enolate anion formed in this reaction (only need to provide one resonance contributor). HiC o: H2C Нас pKa -20 pKa -33 Enolate oti (2 pts) Based on the information provided, do you expect the favored enolate to be the kinetic or thermodynamic enolate? Briefly explain.
Problem 19.41a Write a detailed mechanism for the following reaction. EtoY OE orbollowed OEt + EtoNa Eto OEt OE Get help answering Molecular Drawing questions. X Incorrect. Draw step one of the mechanism which forms the initial carbanion. Draw only the carbanion form of the reaction, NOT the enolate. Include lone pairs and formal charges in the mechanism. Draw out explicitly only the ONE hydrogen that is removed in this mechanistic step. DO NOT USE ABBREVIATIONS SUCH AS OEt for...
The following structure represents an intermediate formed by addition of an ester enolate ion to a second ester molecule. Draw the reactant. ball & stick Blabels • You do not have to consider stereochemistry, • You do not have to explicitly draw Hatoms. • Do not include lone pairs in your answer. They will not be considered in the grading С P 012 <
7. Draw the structure of the organic product(s) formed in the following reaction, and propose an electron-pushing mechanism for the reaction. Use arrows to clearly show the movement of electrons in each step. L E + OH + H heat - NCH₃ Mechanism: Final product(s):
Draw the major enolate region-isomer expected from each of these carbon acids under the reaction condition indicated in the incomplete equations. Classify each enolate as either kinetic or thermodynamic (16 pts.) LDA. - 78 on .28 KO-t-Bu t-BUOH KO-t-Bu 1-BUOH
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...
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