Problems and exercisesExamples
1. Retrosynthesis
Carry out a retrosynthetic analysis: draw the structures of the diene and dienophile that lead to each Diels-Alder adduct.

2. Adduct with an alkyne
What is obtained from 1,3-butadiene with dimethyl acetylenedicarboxylate, MeO2C–C≡C–CO2Me?