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Exam 19: Enolate Anions and Enamines

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Question 31

Multiple Choice

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How many different β-hydroxyaldehydes and β-hydroxyketones, including constitutional isomers and stereoisomers, are formed upon treatment of a mixture of acetone and acetophenone with base?

A) 4
B) 6
C) 9
D) 12

E) C) and D)
F) B) and C)

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Question 32

Multiple Choice

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What is the major organic product obtained from the following sequence of reactions?

A) 1
B) 2
C) 3
D) 4

E) A) and B)
F) A) and C)

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Question 33

Short Answer

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The class of compound formed in the reaction of the following two substance is a(n)__________.

What is the major organic product obtained from the following sequence of reactions?

The more the substitution of the _____ of an enolate anion, the greater its stability.

What is the major organic product obtained from the following reaction?

What is the major organic product obtained from the following reaction?

In an aldol reaction the following substance could be produced by the reaction of acetone (propanone) and _______________. Enter the name of the substance.

Tautomerization is catalyzed by both acids and bases.

What is the major organic product obtained from the following reaction?

How many different β-hydroxyaldehydes and β-hydroxyketones, including constitutional isomers and stereoisomers, are formed upon treatment of a mixture of butanal and acetone with base?

What is the major organic product obtained from the following reaction?

Claisen and aldol condensations can result in cyclization but the Robinson annulation cannot.

In a Claisen condensation catalyzed by the enzyme thiolase, acetyl-CoA is converted to its _____ ion, which then adds to the carbonyl group of the second molecule of acetyl-CoA to give a tetrahedral addition intermediate.

In an aldol reaction the following substance could be produced by the reaction of benzaldehyde and _______________. Enter the name of the substance.

What is the major organic product obtained from the following reaction?

Acetoacetyl-CoA reacts with acetyl-CoA to give product A in the presence of 3-hydroxy-3-methyl-glutaryl-CoA synthetase. Identify the special feature of this reaction.

What is the major organic product obtained from the following sequence of reactions?

What is the major organic product obtained from the following sequence of reactions?

What is the major organic product obtained from the following sequence of reactions?