R₂ R₁ R₁ a R Rg Nu R₂ Rg R₁ R R₁₂ R3 R R Nu enolate forming R₁ R B-Alkylated carbonyl species or amines Cyclic B-Ketoester R₁₁ HOB R R₁B R R₁₂ B-Hydroxy carbonyl R diester R2 R3 R₁ RB OR R₂ 0 aB-Unsaturated carbonyl NaOR Aldol HOR reaction 1) LDA 2) R-X 3) H₂O/H₂O ketone, aldehyde 1) 2°-amine 2) acid chloride 3) H₂O'/H₂O 0 O R₁ R₁ R R₁ R₁₂ Alkylated a-carbon R₁ H.C R₁ H.C Alkylated methyl ketone acetoacetic ester B-Ketoester ester R₁ HO R₂ R B-Dicarbonyl HO Alkylated carboxylic acid malonic ester Write the reagents required to bring about each reaction next to the arrows shown. Next, record any regiochemistry or stereochemistry considerations relevant to the reaction. You should also record any key aspects of the mechanism, such as forma- tion of an important intermediate, as a helpful reminder. You may want to keep track of all reactions that make carbon-carbon bonds, because these help you build large molecules from smaller fragments. This especially applies to the reactions in Chapter 19. On the above organic chemistry roadmap template, the information for the aldol reac- tion has been added to help you get started. Appendix 10 contains a series of reaction roadmaps for different sections of the book, but you should use those for reference only after you have completed your own.
R₂ R₁ R₁ a R Rg Nu R₂ Rg R₁ R R₁₂ R3 R R Nu enolate forming R₁ R B-Alkylated carbonyl species or amines Cyclic B-Ketoester R₁₁ HOB R R₁B R R₁₂ B-Hydroxy carbonyl R diester R2 R3 R₁ RB OR R₂ 0 aB-Unsaturated carbonyl NaOR Aldol HOR reaction 1) LDA 2) R-X 3) H₂O/H₂O ketone, aldehyde 1) 2°-amine 2) acid chloride 3) H₂O'/H₂O 0 O R₁ R₁ R R₁ R₁₂ Alkylated a-carbon R₁ H.C R₁ H.C Alkylated methyl ketone acetoacetic ester B-Ketoester ester R₁ HO R₂ R B-Dicarbonyl HO Alkylated carboxylic acid malonic ester Write the reagents required to bring about each reaction next to the arrows shown. Next, record any regiochemistry or stereochemistry considerations relevant to the reaction. You should also record any key aspects of the mechanism, such as forma- tion of an important intermediate, as a helpful reminder. You may want to keep track of all reactions that make carbon-carbon bonds, because these help you build large molecules from smaller fragments. This especially applies to the reactions in Chapter 19. On the above organic chemistry roadmap template, the information for the aldol reac- tion has been added to help you get started. Appendix 10 contains a series of reaction roadmaps for different sections of the book, but you should use those for reference only after you have completed your own.
Chapter23: Carbonyl Condensation Reactions
Section23.11: Carbonyl Condensations With Enamines: The Stork Reaction
Problem 19P
Related questions
Question

Transcribed Image Text:R₂
R₁
R₁
a
R
Rg
Nu
R₂
Rg
R₁
R
R₁₂
R3
R
R
Nu enolate forming
R₁ R
B-Alkylated carbonyl
species or amines
Cyclic B-Ketoester
R₁₁
HOB
R
R₁B
R
R₁₂
B-Hydroxy carbonyl
R
diester
R2 R3
R₁
RB
OR
R₂ 0
aB-Unsaturated carbonyl
NaOR
Aldol
HOR
reaction
1) LDA
2) R-X
3) H₂O/H₂O
ketone,
aldehyde
1) 2°-amine
2) acid chloride
3) H₂O'/H₂O
0
O
R₁
R₁
R
R₁
R₁₂
Alkylated a-carbon
R₁
H.C
R₁
H.C
Alkylated methyl ketone
acetoacetic
ester
B-Ketoester
ester
R₁
HO
R₂ R
B-Dicarbonyl
HO
Alkylated carboxylic acid
malonic ester
Write the reagents required to bring about each reaction next to the arrows shown.
Next, record any regiochemistry or stereochemistry considerations relevant to the
reaction. You should also record any key aspects of the mechanism, such as forma-
tion of an important intermediate, as a helpful reminder. You may want to keep
track of all reactions that make carbon-carbon bonds, because these help you build
large molecules from smaller fragments. This especially applies to the reactions in
Chapter 19.
On the above organic chemistry roadmap template, the information for the aldol reac-
tion has been added to help you get started. Appendix 10 contains a series of reaction
roadmaps for different sections of the book, but you should use those for reference only
after you have completed your own.
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