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Predict the product from the following sequence: Predict the product from the following sequence: A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Explain why ethyl 2-methylpropanoate does not undergo the usual Claisen condensation.

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In order for Claisen condensation to occ...

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Suggest a reasonable synthetic strategy to carry out the following transformation. Suggest a reasonable synthetic strategy to carry out the following transformation.

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Which compound may be prepared using a Mannich reaction? Which compound may be prepared using a Mannich reaction? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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What starting compound(s) would you use in an aldol reaction to prepare as the major product: What starting compound(s) would you use in an aldol reaction to prepare as the major product: A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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What is the missing reagent? What is the missing reagent? A) B) C) D) E)


A)
What is the missing reagent? A) B) C) D) E)
B)
What is the missing reagent? A) B) C) D) E)
C)
What is the missing reagent? A) B) C) D) E)
D)
What is the missing reagent? A) B) C) D) E)
E)
What is the missing reagent? A) B) C) D) E)

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Which of these compounds can react with 4-methylhexanal to afford good yields of the crossed aldol product?


A) 3-(4-Nitrophenyl) propanal
B) 2-Methyl-3-pentanone
C) 2-(4-Nitrophenyl) propanal
D) 3-(4-Nitrophenyl) -2-butanone
E) None of the above compounds will give good yields of the crossed aldol product with 4-methylhexanal.

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There are several possible cyclization products that might be formed when 5-methyl-6-oxoheptanal undergoes intramolecular aldol condensation in presence of ethoxide.Draw the structures of all these possible products.Comment on which of these is likely to be the major product,clearly explaining your rationale.

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There are 3 possible products (I-III)tha...

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Why is CH3ONa not used in the Claisen condensation of ethyl acetate?


A) CH3O- is a weaker base than the CH3CH2O- which is used.
B) CH3O-Na+ is more difficult to prepare than CH3CH2O-Na+.
C) CH3O- would abstract a proton from the ethyl group of the ester.
D) Use of CH3O-Na+ would result in transesterification.
E) CH3O-Na+ can be used as well as CH3CH2O-Na+.

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What is the final product of the following reaction sequence? Give structural details of all significant intermediates. What is the final product of the following reaction sequence? Give structural details of all significant intermediates.

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What would be the major product of the following reaction? What would be the major product of the following reaction? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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What is the product of the Dieckmann-like condensation of this ketoester, What is the product of the Dieckmann-like condensation of this ketoester, A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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What is the product of the following reaction? What is the product of the following reaction?

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What would be the major product,B,of the following reaction sequence? What would be the major product,B,of the following reaction sequence? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

Correct Answer

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What is the final product of the following reaction sequence? Give structural details of all significant intermediates. What is the final product of the following reaction sequence? Give structural details of all significant intermediates.

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What is the final product of the following reaction sequence? Give structural details of all significant intermediates. What is the final product of the following reaction sequence? Give structural details of all significant intermediates.

Correct Answer

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What starting compound(s) would you use in an aldol reaction to prepare as the major product: What starting compound(s) would you use in an aldol reaction to prepare as the major product: A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

Correct Answer

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An aldol reaction that starts with two different carbonyl compounds is called a _______________.

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crossed al...

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The product,C,of the following sequence of reactions, The product,C,of the following sequence of reactions, would be: A) B) C) D) E) would be:


A)
The product,C,of the following sequence of reactions, would be: A) B) C) D) E)
B)
The product,C,of the following sequence of reactions, would be: A) B) C) D) E)
C)
The product,C,of the following sequence of reactions, would be: A) B) C) D) E)
D)
The product,C,of the following sequence of reactions, would be: A) B) C) D) E)
E)
The product,C,of the following sequence of reactions, would be: A) B) C) D) E)

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Explain why diethyl pentanedioate does not undergo a Dieckmann condensation.

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Dieckmann condensation of diethyl pentan...

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