In each Diels–Alder reaction shown, predict the product that will result.(a)

Predict the product of the following Diels–Alder reactions. Where a racemic mixture is produced, show both enantiomers and explain how each is formed.

(d)

Figure 22.16(a) <IMAGE> shows a unique example where the Diels–Alder reaction gives a single product (no enantiomers) regardless of whether the diene attacks the dienophile from the top or bottom.

(a) Show the product of the diene attacking from the bottom and confirm that the same product is obtained.

(b) What is special about this product that makes this true?

Assuming the diene approaches the dienophile from the top, predict the product of the following Diels–Alder reactions.

(c)

In each Diels–Alder reaction shown, predict the product that will result.

(c)

Predict the product of the following reactions. [When all of the reactions from this chapter are shown together, you must first decide which type of reaction each is. Is it a Diels–Alder, an electrocyclic, or a sigmatropic rearrangement? Drawing the product will be easier once this determination is made.]

(a)

Show the steps involved in the following reaction:

Predict the products of the following proposed Diels–Alder reactions. Include stereochemistry where appropriate.

(e)

(f)