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What two sets of a conjugated diene and a dienophile could be used to prepare the following compound?
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- Which dienophile in each pair is more reactive in a Diels–Alder reaction?What diene and dienophile are needed to prepare each compound by a Diels–Alder reaction?Rank the following dienes in their rate of reaction with the same dienophile in a Diels-Alder reaction. For example, 1 = fastest or most reactive diene, 4 = slowest or least reactive diene.
- Determine what conjugated diene and what dienophile wereused to make starting materials from a given Diels–Alder adduct ?Which of the following conjugated dienes will not react with a dienophile in a Diels–Alder reaction?Rank the following dienophiles in their rate of reaction with the same diene in a Diels-Alder reaction. For example, 1 = fastest or most reactive dienophile, 4 = slowest or least reactive dienophile.
- Although the Diels–Alder reaction generally occurs between an electronrich diene and an electron-deficient dienophile, it is also possible to have inverse-demand Diels–Alder reactions between suitable electrondeficient conjugated double bonds and electron-rich alkenes. These reactions are particularly useful because they allow for the incorporation of heteroatoms into the new six-membered ring. Predict the products of each inverse-demand Diels–Alder reaction below. Be sure your products reflect the correct stereochemistry. If more than one regioisomer is possible, draw both.What diene and dienophile are needed to prepare each Diels–Alder product?Show the starting diene and dienophile you could use to prepare the following molecule: