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Chapter 16: PROBLEM 16.24 (page 627)

Question: Draw the product of each Diels鈥揂lder reaction.

a.

b.

Short Answer

Expert verified

Answer

a.

b.

Step by step solution

01

Diels-Alder reaction

Diels-Alder reaction is also known as 4蟺+2蟺 cycloaddition.

This reaction is thermally allowed, but it is photochemically forbidden.

02

Mechanism of Diels-Alder reaction

Mechanism of the Diels-Alder reaction using an example is shown below:

Mechanism of Diels-Alder reaction

03

To find the product of the reaction

The product with endo substitution will be preferred for the Diels-Alder reaction.

The Diels-Alder reaction of cyclopentadiene is shown below:

Diels-Alder reaction

The product obtained contains an endo substituent.

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Most popular questions from this chapter

Question. Draw the structure consistent with each description.

a. (2E,4E)-octa-2,4-diene in the s-trans conformation

b. (3E,5Z)-nona-3,5-diene in the s-cis conformation

c. (3Z,5Z)-4,5-dimethyldeca-3,5-diene. Draw both the s-cis and s-trans conformations.

Question: What diene and dienophile are needed to prepare each Diels鈥揂lder product?

a.

b.

c.

d.

Question: Use resonance theory and the Hammond postulate to explain why 3-chloroprop-1-eneCH2=CHCH2Cl is more reactive than 1-chloropropaneCH3CH2CH2Cl in SN1 reactions.

Question: Draw the product formed when each diene and dienophile react in a Diels鈥揂lder reaction.

a.

b.

c.

Question: Explain, with reference to the mechanism, why addition of one equivalent of HCl to diene A forms only two products of electrophilic addition, even though four constitutional isomers are possible.
See all solutions

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