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Chapter 24: Q.14. (page 962)

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

Short Answer

Expert verified

Answer

a.

b.

Step by step solution

01

Dehydration reaction

The removal of water from a compound yields alkene. This reaction is termed a dehydration reaction.

02

Formation of products

a. The reaction is shown below:

Product formation in a

b. The reaction is shown below:

Product formation in b

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Most popular questions from this chapter

Question: Avobenzone is a conjugated compound that absorbs ultraviolet light with wavelengths in the 320鈥�400 nm region, so it is a common ingredient in commercial sunscreens. Write out two different crossed Claisen reactions that form avobenzone.

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 bicyclic ring systems can be prepared by an intermolecular Robinson annulation?

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

Question: In theory, the intramolecular aldol reaction of 6-oxoheptanal could yield the three compounds shown. It turns out, though, that 1-acetylcyclopentene is by far the major product. Why are the other two compounds formed in only minor amounts? Draw a stepwise mechanism to show how all three products are formed.
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