What combination of diene and dienophile would you choose in order to prepare each of the...

What combination of diene and dienophile would you choose in order to prepare each of the following compounds?

Sample Solution (a) Using curved arrows, we represent a Diels–Alder reaction as

To deduce the identity of the diene and dienophile that lead to a particular Diels–Alder adduct, we use curved arrows in the reverse fashion to “undo” the cyclohexene derivative. Start with the π component of the double bond in the six-membered ring, and move electrons in pairs.