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Concept explainers
a)
Interpretation:
The structure of the
Concept introduction:
Aldehydes and ketones with α-hydrogen undergo a base catalyzed carbonyl condensation reaction in aldol condensation. In this reaction two molecules of the reactant combine by forming a bond between α-carbon of one molecule and the carbonyl carbon within the same molecule or of the second molecule to give an aldol. The aldol dehydrates on heating to yield α, β-unsaturated aldehyde or ketone.
To show:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction.
b)
Interpretation:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction is to be shown.
Concept introduction:
Aldehydes and ketones with α-hydrogen undergo a base catalyzed carbonyl condensation reaction in aldol condensation. In this reaction two molecules of the reactant combine by forming a bond between α-carbon of one molecule and the carbonyl carbon within the same molecule or of the second molecule to give an aldol. The aldol dehydrates on heating to yield α, β-unsaturated aldehyde or ketone.
To show:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction.
c)
Interpretation:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction is to be shown.
Concept introduction:
Aldehydes and ketones with α-hydrogen undergo a base catalyzed carbonyl condensation reaction in aldol condensation. In this reaction two molecules of the reactant combine by forming a bond between α-carbon of one molecule and the carbonyl carbon within the same molecule or of the second molecule to give an aldol. The aldol dehydrates on heating to yield α, β-unsaturated aldehyde or ketone.
To show:
The structure of the aldehyde that should be used as a starting material to synthesize the compound given in an aldol reaction.
d)
Interpretation:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction is to be shown.
Concept introduction:
Mixed aldol condensation leads to a single product if i)one of the carbonyl partners contains no α hydrogen atoms but contains an unhindered carbonyl group and ii) if one of the carbonyl partners are much more acidic than the other and thus forms an enolate anion in preference to other.
To show:
The structure of the aldehydes or ketones that should be used as a starting material to synthesize the compound given in an aldol reaction.
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Chapter 23 Solutions
Organic Chemistry
- Synthesis Reaction for Organic Chemistry Can you go from the starting material to the product using mostly aldol reactionsarrow_forwardWhat are the products of an aldol cyclization for the following compound?arrow_forwardPredict the major product of the reactions shown below. Do not forget to take into account regioselectivity and stereoselectivity of each reaction. If the reaction is an Aldol reaction, draw the condensation product. If thequestion has Retrosynthetic arrows, draw the one or two starting materials.arrow_forward
- Please give the reagents that will perform the following reaction.arrow_forwardDraw the major product of the aldol addition reaction between two equivalents of this ketone with the conditions provided. Ignore inorganic byproducts.arrow_forwardThe product below can be synthesized by a Robinson annulation, which is a Michael addition followed by an aldol condensation/elimination. Draw the starting materials you would use. Also draw the structure of the intermediate after the Michael addition is completed, but before the aldol reaction has started.arrow_forward
- 16. Draw the structure of the aldol self-condensation (followed by dehydration) product for each of the following compounds. If a compound does not undergo aldol self-condensation, explain why it does not. a) || CH3CHCH₂CH T CH₂ b)arrow_forwardSynthesis: Show how you would carry out the following synthesis. Include the reagents you would need for each step and the structure of the intermediate products formed in each step. You may use any inorganic reagents you need and organic reagents of four or fewer carbons.arrow_forwardShow how to prepare a,b-unsaturated ketone by an aldol reaction followed by dehydration of the aldol product.arrow_forward
- Draw the structure of the major organic product of the following reaction. Predict whether the product will be an aldol or an enonearrow_forwardDraw the structures of the two Aldol condensation products based on the identified aldehydes and ketones.arrow_forwardDraw the structure of the major aldol product (prior to possible dehydration) of the following reaction. CH3 CH3 CH3 H dilute aqueous NaOH 0-5° • You do not have to consider stereochemistry. • If no reaction occurs, draw the organic starting material. {n [t ? ChemDoodlearrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
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