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Chapter 24: Q.29. (page 962)

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

Short Answer

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Answer

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01

Ozonolysis

O3in the presence of (CH3)2S introduces double-bonded oxygen at each of the carbon in the C=C bond.

02

Intra-molecular aldol reaction

In acyclic compounds containing two carbonyl groups, the aldol reaction may help to form either a five or a six-membered ring.

03

Steps of the given reaction

The above-given reaction proceeds via two reactions. Both of these steps are shown here under.

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Most popular questions from this chapter

Question: What cyclic product is formed when each 1,5-dicarbonyl compound is treated with aqueous OH?

Question: Answer the following questions about 2-acetylcyclopentanone.

a. What starting materials are needed to form 2-acetylcyclopentanone by a Claisen reaction that forms bond (a)?

b. What starting materials are needed to form 2-acetylcyclopentanone by a Claisen reaction that forms bond (b)?

c. What product is formed when 2-acetylcyclopentanone is treated with NaOCH2CH3, followed by CH3I?

d. Draw the Robinson annulation product(s) formed by reaction of 2-acetylcyclopentanone with methyl vinyl ketone (CH2=CHCOCH3).

e. Draw the structure of the most stable enol tautomer(s).

Question: Which of the following compounds can serve as Michael acceptors?

Question: Zingerone, a spicy-sweet component of cooked ginger, can be converted to its protected TBDMS ether A, as we learned in Chapter 20. How can A be converted to gingerol, a compound present in fresh ginger, using a directed aldol reaction as a key step?

Question: What two 尾-keto esters are formed in the Dieckmann reaction of the following diester?
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