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Chapter 24: Q.35. (page 962)

Question: What dicarbonyl compound is needed to prepare each compound by an intramolecular aldol reaction?

Short Answer

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Answer

Step by step solution

01

Detect the α and β carbons

The αandβ carbon bond is cleaved to open the ring.

02

Addition to the α and β-carbons

Upon cleavage, the α-carbon is added with a hydrogen atom. However, the β-carbon is converted into a carbonyl group(C=O) , and the tetravalency of the carbon is satisfied with the hydrogen atom.

03

Product of the given reaction

a. The starting materials of the product are detected hereunder.

Starting materials of a.

b. The starting materials of the product are detected hereunder.

Starting materials of b.


c. The starting materials of the product are detected hereunder.

Starting materials of c.

d. The starting materials of the product are detected hereunder.

Starting materials of d.

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Most popular questions from this chapter

Question: Draw the products of each reaction.

Question: What aldol product is formed when two molecules of butanal react together in the presence of base? What reagents are needed to convert this product to each of the following compounds?

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

a.

b.

Question: Which of the following bicyclic ring systems can be prepared by an intermolecular Robinson annulation?

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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