The preparation of the below given compound using directed aldol reactions has to be given. Concept Introduction: In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate. LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes , ketones and esters into their enolate anions.

Question

Look at the following pairs of structures carefully to identify them as representing a) completely different compounds, b) compounds that are structural isomers of each other, c) compounds that are geometric isomers of each other, d) conformers of the same compound (part of structure rotated around a single bond) or e) the same structure.

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 19.9, Problem 19.17P

(a)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

(b)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

Look at the following pairs of structures carefully to identify them as representing a) completely different compounds, b) compounds that are structural isomers of each other, c) compounds that are geometric isomers of each other, d) conformers of the same compound (part of structure rotated around a single bond) or e) the same structure.

Given 10.0 g of NaOH, what volume of a 0.100 M solution of H2SO4 would be required to exactly react all the NaOH?

3.50 g of Li are combined with 3.50 g of N2. What is the maximum mass of Li3N that can be produced? 6 Li + N2 ---> 2 Li3N

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 19.9, Problem 19.17P

(a)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

(b)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

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 19.9, Problem 19.17P

(a)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

(b)

Interpretation Introduction

Interpretation:

The preparation of the below given compound using directed aldol reactions has to be given.

Concept Introduction:

In directed aldol reactions, the enolate anion is prepared with one carbonyl compound by LDA (Lithium diisopropylamide). The other carbonyl compound acts as an electrophile. Both of the carbonyl compounds have α-hydrogens, but only one enolate is prepared using LDA. When unsymmetrical ketone is used, it forms less substituted enolate.

LDA (Lithium diisopropylamide) is a strong base. It converts aldehydes, ketones and esters into their enolate anions.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

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 19.9, Problem 19.17P

(a)

Interpretation Introduction