Organic Chemistry 2: Delocalized Pi Systems

Explain why the reaction between HBr and 1,3-Butadiene results in a different major product at 40°C than -80°C

Propose a synthesis using Diels-Alder reactions for the following molecule.

Show the mechanism and product of the following reaction

Propose a synthesis using a Diels-Alder reaction for the following molecule

Show the mechanism and product of the following reaction