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Chapter 24: Q.7. (page 962)

Question: Draw the products formed in each crossed aldol reaction.

a.

b.

Short Answer

Expert verified

Answer

a.

b.

Step by step solution

01

Cross aldol reaction

The reaction between two non-identical carbon compounds in the presence of a base is termed crossed aldol reaction.

It is also known as a mixed aldol reaction.

02

Cross aldol reaction of a

The aldol reaction between butanal and formaldehyde is represented below:

Cross aldol reaction of a.

03

Cross aldol reaction of b

The aldol reaction between benzaldehyde and cyclohexanone is represented below:

Cross aldol reaction b.

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Most popular questions from this chapter

Question: (a) Draw a stepwise mechanism for the reaction of ethyl hexa-2,4-dienoate with diethyl oxalate in the presence of base.

(b) How does your mechanism explain why a new carbon-carbon bond forms on C6?

(c) Why is this reaction an example of a crossed Claisen reaction?

Question: Draw the products when each pair of compounds is treated with CH3CH2O-,CH3CH2OH in a Robinson annulation reaction.

Question: Devise a synthesis of each compound from the given starting material. You may use any other organic compounds or required inorganic reagents

Question: What steps are needed to convert A to B?

Question: 4-Methylpyridine reacts with benzaldehyde (C6H5CHO)in the presence of a base to form A.

(a) Draw a stepwise mechanism for this reaction.

(b) Would you expect 2-methylpyridine or 3-methylpyridine to undergo a similar type of condensation reaction? Explain why or why not.
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