The preparation of the given α,β -unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown. Concept introduction: Aldol reaction is an addition reaction of aldehydes and ketones . Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β -hydroxy aldehyde if two aldehydes combine and β -hydroxy ketone if two ketones combine.

Question

What is the product formed when each dicarbonyl compound undergoes an intramolecular aldol reaction, followed by dehydration.

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

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What is the product formed when each dicarbonyl compound undergoes an intramolecular aldol reaction, followed by dehydration.

Draw the product formed when each dicarbonyl compound undergoes an intramolecular aldol reaction followed by dehydration, when possible.

Draw the product formed when each dicarbonyl compound undergoes anintramolecular aldol reaction followed by dehydration, when possible.

Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

Expert Solution & Answer

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Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction